import changes from `dev' branch of rmottola/Arctic-Fox:

- Bug 1159056. Don't store a value in CSS pixels in a variable with type nscoord in ScrollFrameHelper::SetCoordAttribute. r=dholbert (432f06158) - Bug 1138442 - Disable reftests on Mulet in parity with B2G/B2G Desktop. r=ahal (8b5c55da7) - Don't clip in ComputeFrameMetrics if the scrollframe won't be layerized. (bug 1148582 part 2, r=tn) (088b6ef29) - Bug 1157579 - Make sure the visual scroll port size includes the area of scrollbars when used in TryLayout. r=tn (c35244374) - Bug 1139306: Fix margin sides for right-to-left scrollbars depending on the actual position of the scrollbar as determined by layout.scrollbar.side, r=tn (34328312d) - Fix some full zoom FrameMetrics changes not propagating to APZ. (bug 1147648, r=botond) (91f009ac4) - Bug 1159405 - Fix "Found a non-root APZ with no handoff parent". r=botond (09b0ddf07) - Bug 1161040 - Don't set a scrollparent on the root content document in the child process that points to itself. r=tn (d0dfbffb0) - Bug 1161040 - Add some assertions to guard against infinite loops in the handoff chains. r=botond (e6bae82e8) - Bug 1153539 patch 1 - Improve comments for nsLayoutUtils::ComputeSuitableScaleForAnimation. r=roc (1b2bc00cd) - Bug 1153539 patch 2 - Compute scale for rasterizing off-main-thread transform animations based on ratio to display size in addition to maximum and minimum scale. r=roc (97d632d0f) - Bug 1160250 - Extract a helper method from the triplicated comp-bounds function to determine if we need to deflate the scrollbars. r=botond,tn (8d79c845f) - Bug 1160250 - Extract a helper function from the triplicated composition-bounds-updating code. r=botond,tn (5b3f71329) - Bug 1160250 - Collapse the code from CalculateRootCompositionSize into UpdateCompositionBounds. r=botond,tn (db0f081d6) - Bug 1160250 - Put in a missing transfomToAncestor scaling factor. r=botond,tn (14837aa3a) - Bug 1160250 - Fix up the rect being used for the composition size calculation. r=tn (0ba58021f) - Bug 1139575 - Reset velocity on axes when going from a pan to a pinch. r=botond (2e03d04ab) - Bug 1136971 - Draw layer borders correctly in the presence of multi-FrameMetrics. r=kats (e72f5b171) - Bug 1148871 - Only apply checkerboarding background color to opaque layers. r=botond (20e070b84) - Bug 1157327 - Don't cull out container layers, because their prepared data might be null and cause crashes. r=nical (3d06c925f) - Bug 1157327 follow-up to add a comment. r=me and DONTBUILD (4cd74c0a1) - Bug 1160566 - Make FrameMetrics.mCompositionBounds private and add a getter/setter for it. r=botond (277dd9afd) - Bug 1160566 - Change some return values to be reference-to-const. r=botond (2ce17b63f) - Bug 1158933 - Prevent scrollbars from jumping while zoomed in the B2G browser. r=botond (eca8aae7d) - Bug 1158933 - Replace the compositedHeight/scrollableHeight (and width) term with the adjusted scrollThumbRatio. r=botond (236af4c4a) - Bug 1156401 - Fix painting when building fennec with apzc. r=kats, r=botond (be18764b9) - Bug 1159305 - patch 1 - Provide logical accessors for nsStylePosition and nsStyleSides fields. r=dbaron (7a90c519d) - Bug 1159305 - patch 2 - Clean up layout code by using the new accessors. r=smontagu (926eb7dd5) - Bug 1164406 - Expose scrollbar-area deflation in nsLayoutUtils. r=kats (42e5e8784) - Bug 1139895 - Add fuzz for 1062792-1.html. r=tn (e38d0ac73) - Bug 1139893 - Disable reftest bugs/1062108-1.html on mulet. r=jfkthame (930590d73) - Move the APZ scroll frame clip onto FrameMetrics. (bug 1148582 part 3, r=mstange,tn) (c8e05f8d7) - Fix PostprocessRetainedLayers to not test occlusion with asynchronous clips. (bug 1148582 part 5, r=tn) (cc71cafe2) - Bug 1146626 - Refresh the reftest snapshot after adjusting the async scroll offsets. r=roc (1f041955d) - Bug 1160642. Add reftest-async-zoom to apply an async zoom before taking snapshot. r=dbaron (1e8e54d8d) - Bug 1160285 - Add a staticruntime version of mfbt and link some stuff against it. r=glandium (c733c49c7) - Bug 786520 - Install things to $(DIST)/branding from moz.build instead of manual rules in Makefile.ins. r=mshal (42d38eb26) - Bug 1155776 - move USE_EXTENSION_MANIFEST to moz.build; r=mshal (a87ecc2ca) - Bug 1155816 - part 0 - remove NO_JS_MANIFEST from testing/mochitest/Makefile.in; r=mshal (af90a362c) - Bug 1155816 - part 1 - move NO_JS_MANIFEST to moz.build; r=mshal (3a55e99a0) - Bug 978591 - Remove per-directory uses of MOZ_CHROME_FILE_FORMAT. r=glandium (5084d62b5) - Bug 991983 - Set GARBAGE for GeneratedSources in the recursivemake backend. r=gps (b8ae57c14) - Bug 991983 - Emit absolute paths for UnifiedSources. r=gps (4100640d0) - Bug 991983 - Emit absolute paths for other sources. r=gps (f30ddd773) - Bug 991983 - Remove commented code in gyp_reader.py. r=gps (0685eca6a) - Bug 1167474 - Remove ELFHACK_BUILD hack. r=mshal (b9d56c0b2) - Bug 1097804 - Part 1 - Create a library containing nsISocketTransportService and nsIDNS that can be used to support standalone WebRTC. r=mcmanus (d2f83eb1c) - Bug 1097804 - Part 2 - Added xpcomrt build of library containing unicode util functions. r=gps (fa9306f34) - Bug 1162852 - Remove EXTRA_COMPILE_FLAGS. r=gps (340312bc6) - Bug 1162852 - Remove EXTRA_ASSEMBLER_FLAGS. r=gps (f124c902c) - Bug 1162852 - Remove the VARIABLES method of GypContext now it is doing nothing. r=gps (b6c1c0246) - accidental commit (a1bbb1ada) - Bug 991983 - Define SOURCES as SourcePath. r=gps (678065bce) - Bug 991983 - Use objdir-relative SOURCES instead of GENERATED_SOURCES. r=gps (b54db0304) - Bug 991983 - Make TEST_HARNESS_FILES use the *Path classes instead of a separate set of methods to resolve paths. r=gps (025fe1ca9) - Bug 991983 - Add a deprecation hint for GENERATED_SOURCES. r=gps (67c75f4ab) - Bug 1172800 - Fixup after bug 991983. r=gps (ce6e8c7a3) - Bug 1164218 - Allow running individual mochitests and reftests in chaos mode. r=roc,froydnj (f2ec1d9d8) - Bug 1154231 - Part 1. Use LRU to manage remote layers. r=mattwoodrow (1fe47e64f) - Bug 1128037 - Minimalist support for wildcards in jar manifests. r=gps (1b07a6ffc) - Bug 1162569 - default engine files should be in the omni.ja file, r=markh,glandium. (b07e54881) - Bug 1157279. Escaping CSS identifiers should use lowercase letters for hex digits, not uppercase ones. r=dbaron (6f220936e)
2026-05-26 05:11:03 +00:00 · 2020-12-07 11:03:05 +08:00
parent fa9ed1e11b
commit 729a46113b
277 changed files with 3373 additions and 1834 deletions
@@ -6,14 +6,14 @@

 GeckoSharedLibrary('AccessibleMarshal', linkage=None)

-GENERATED_SOURCES += [
-    'dlldata.c',
-    'ISimpleDOMDocument_i.c',
-    'ISimpleDOMDocument_p.c',
-    'ISimpleDOMNode_i.c',
-    'ISimpleDOMNode_p.c',
-    'ISimpleDOMText_i.c',
-    'ISimpleDOMText_p.c',
+SOURCES += [
+    '!dlldata.c',
+    '!ISimpleDOMDocument_i.c',
+    '!ISimpleDOMDocument_p.c',
+    '!ISimpleDOMNode_i.c',
+    '!ISimpleDOMNode_p.c',
+    '!ISimpleDOMText_i.c',
+    '!ISimpleDOMText_p.c',
 ]

 DEFINES['REGISTER_PROXY_DLL'] = True
@@ -20,8 +20,8 @@ UNIFIED_SOURCES += [
    'xpcAccessibleValue.cpp',
 ]

-GENERATED_SOURCES += [
-    'xpcAccEvents.cpp',
+SOURCES += [
+    '!xpcAccEvents.cpp',
 ]

 LOCAL_INCLUDES += [
@@ -1081,3 +1081,6 @@ pref("dom.activities.developer_mode_only", "import-app");
 // mulet apparently loads firefox.js as well as b2g.js, so we have to explicitly
 // disable serviceworkers here to get them disabled in mulet.
 pref("dom.serviceWorkers.enabled", false);
+
+// Retain at most 10 processes' layers buffers
+pref("layers.compositor-lru-size", 10);
@@ -30,19 +30,14 @@ html xul|scrollbar {
  pointer-events: none;
 }

+/* Scrollbar code will reset the margin to the correct side depending on
+   where layout actually puts the scrollbar */
 xul|scrollbar[orient="vertical"] {
-  -moz-margin-start: -8px;
+  margin-left: -8px;
  min-width: 8px;
  max-width: 8px;
 }

-/* workaround for bug 1119057: as -moz-margin-start may not work as expected,
- * force a right margin value in RTL mode.  */
-[dir="rtl"] xul|scrollbar[root="true"][orient="vertical"] {
-  -moz-margin-start: unset;
-  margin-right: -8px;
-}
-
 xul|scrollbar[orient="vertical"] xul|thumb {
  max-width: 6px !important;
  min-width: 6px !important;
@@ -56,7 +56,6 @@
 #endif
@RESPATH@/hyphenation/*
@RESPATH@/browser/@PREF_DIR@/palemoon-l10n.js
-@RESPATH@/browser/searchplugins/*
 #ifdef HAVE_MAKENSISU
@BINPATH@/uninstall/helper.exe
 #endif
@@ -5,9 +5,6 @@

 include $(topsrcdir)/config/config.mk

-vpath %.xml @srcdir@/en-US/searchplugins
-vpath %.xml $(LOCALE_SRCDIR)/searchplugins
-
 ifdef LOCALE_MERGEDIR
 vpath book%.inc $(LOCALE_MERGEDIR)/browser/profile
 endif
@@ -65,7 +62,7 @@ STUB_HOOK = $(NSINSTALL) -D "$(_ABS_DIST)/$(PKG_INST_PATH)"; \
 endif

 SEARCHPLUGINS_NAMES = $(shell cat $(call MERGE_FILE,/searchplugins/list.txt))
-SEARCHPLUGINS_PATH := $(FINAL_TARGET)/searchplugins
+SEARCHPLUGINS_PATH := .deps/generated_$(AB_CD)
 SEARCHPLUGINS_TARGET := libs searchplugins
 SEARCHPLUGINS := $(foreach plugin,$(addsuffix .xml,$(SEARCHPLUGINS_NAMES)),$(or $(wildcard $(call EN_US_OR_L10N_FILE,searchplugins/$(plugin))),$(info Missing searchplugin: $(plugin))))
 # Some locale-specific search plugins may have preprocessor directives, but the
@@ -73,6 +70,11 @@ SEARCHPLUGINS := $(foreach plugin,$(addsuffix .xml,$(SEARCHPLUGINS_NAMES)),$(or
 SEARCHPLUGINS_FLAGS := --silence-missing-directive-warnings
 PP_TARGETS += SEARCHPLUGINS

+list-txt = $(SEARCHPLUGINS_PATH)/list.txt
+GARBAGE += $(list-txt)
+
+libs:: searchplugins
+
 # Required for l10n.mk - defines a list of app sub dirs that should
 # be included in langpack xpis.
 DIST_SUBDIRS = $(DIST_SUBDIR)
@@ -81,6 +83,11 @@ include $(topsrcdir)/config/rules.mk

 include $(topsrcdir)/toolkit/locales/l10n.mk

+$(list-txt): $(call mkdir_deps,$(SEARCHPLUGINS_PATH)) $(if $(IS_LANGUAGE_REPACK),FORCE)
+	$(RM) $(list-txt)
+	$(foreach plugin,$(SEARCHPLUGINS_NAMES),printf '$(plugin)\n' >> $(list-txt);)
+searchplugins:: $(list-txt)
+
 $(STAGEDIST): $(DIST)/branding

 $(DIST)/branding:
@@ -125,6 +132,7 @@ libs-%:
 	@$(MAKE) -C ../../services/sync/locales AB_CD=$* XPI_NAME=locale-$*
 	@$(MAKE) -C ../../extensions/spellcheck/locales AB_CD=$* XPI_NAME=locale-$*
 	@$(MAKE) -C ../../intl/locales AB_CD=$* XPI_NAME=locale-$*
+	@$(MAKE) -B searchplugins AB_CD=$* XPI_NAME=locale-$*
 	@$(MAKE) libs AB_CD=$* XPI_NAME=locale-$* PREF_DIR=$(PREF_DIR)
 	@$(MAKE) -C $(DEPTH)/$(MOZ_BRANDING_DIRECTORY)/locales AB_CD=$* XPI_NAME=locale-$*

@@ -157,8 +165,7 @@ clobber-zip:
 	  $(STAGEDIST)/webapprt/chrome/$(AB_CD).jar \
 	  $(STAGEDIST)/webapprt/chrome/$(AB_CD).manifest \
 	  $(STAGEDIST)/$(PREF_DIR)/palemoon-l10n.js
-	$(RM) -rf  $(STAGEDIST)/searchplugins \
-	  $(STAGEDIST)/dictionaries \
+	$(RM) -rf  $(STAGEDIST)/dictionaries \
 	  $(STAGEDIST)/hyphenation \
 	  $(STAGEDIST)/defaults/profile \
 	  $(STAGEDIST)/chrome/$(AB_CD) \
@@ -89,6 +89,8 @@
    locale/browser/syncQuota.dtd                (%chrome/browser/syncQuota.dtd)
    locale/browser/syncQuota.properties         (%chrome/browser/syncQuota.properties)
 #endif
+    locale/browser/searchplugins/list.txt       (.deps/generated_@AB_CD@/list.txt)
+    locale/browser/searchplugins/               (.deps/generated_@AB_CD@/*.xml)
 % locale browser-region @AB_CD@ %locale/browser-region/
    locale/browser-region/region.properties        (%chrome/browser-region/region.properties)
 # the following files are browser-specific overrides
@@ -7,14 +7,6 @@ USE_RCS_MK := 1
 include $(topsrcdir)/config/makefiles/makeutils.mk

 ifdef MOZ_APP_BASENAME
-DIST_FILES = $(srcdir)/application.ini
-
-ifneq (android,$(MOZ_WIDGET_TOOLKIT))
-ifdef MOZ_UPDATER
-DIST_FILES += update-settings.ini
-endif
-endif
-
 ifdef LIBXUL_SDK
 APP_INI_DEPS = $(LIBXUL_DIST)/bin/platform.ini
 else
@@ -59,6 +59,15 @@ file from the alternate localization source tree

   locale/path/localized.dtd     (%localized/path/localized.dtd)

+The source tree location can also use wildcards, in which case the path in
+jar is expected to be a base directory. Paths before the wildcard are not
+made part of the destination path::
+
+     path/in/jar/                (source/tree/location/*.xul)
+
+The above will install all xul files under ``source/tree/location`` as
+``path/in/jar/*.xul``.
+
 Register Chrome
 ===============

@@ -70,3 +70,8 @@ FINAL_TARGET_FILES += [TOPSRCDIR + '/.gdbinit']
 # Install the clang-cl runtime library for ASAN next to the binaries we produce.
 if CONFIG['MOZ_ASAN'] and CONFIG['CLANG_CL']:
    FINAL_TARGET_FILES += [CONFIG['MOZ_CLANG_RT_ASAN_LIB_PATH']]
+
+if CONFIG['MOZ_APP_BASENAME']:
+    DIST_FILES += ['application.ini']
+    if CONFIG['MOZ_WIDGET_TOOLKIT'] != 'android' and CONFIG['MOZ_UPDATER']:
+        DIST_FILES += ['update-settings.ini']
@@ -13,12 +13,10 @@ elif CONFIG['TARGET_CPU'].startswith('arm'):
 else:
    cpu = CONFIG['TARGET_CPU']

-GENERATED_SOURCES += [
-    "%s.c" % cpu,
+SOURCES += [
+    "!%s.c" % cpu,
 ]

-DEFINES['ELFHACK_BUILD'] = True
-
 NO_PGO = True

 NO_VISIBILITY_FLAGS = True
@@ -25,6 +25,4 @@ HOST_SOURCES += [

 HostProgram('elfhack')

-DEFINES['ELFHACK_BUILD'] = True
-
 NO_PGO = True
@@ -451,11 +451,11 @@ OS_COMPILE_CMMFLAGS += -fobjc-abi-version=2 -fobjc-legacy-dispatch
 endif
 endif

-COMPILE_CFLAGS	= $(VISIBILITY_FLAGS) $(DEFINES) $(INCLUDES) $(OS_INCLUDES) $(DSO_CFLAGS) $(DSO_PIC_CFLAGS) $(RTL_FLAGS) $(OS_CPPFLAGS) $(OS_COMPILE_CFLAGS) $(CFLAGS) $(MOZBUILD_CFLAGS) $(EXTRA_COMPILE_FLAGS)
-COMPILE_CXXFLAGS = $(if $(DISABLE_STL_WRAPPING),,$(STL_FLAGS)) $(VISIBILITY_FLAGS) $(DEFINES) $(INCLUDES) $(OS_INCLUDES) $(DSO_CFLAGS) $(DSO_PIC_CFLAGS) $(RTL_FLAGS) $(OS_CPPFLAGS) $(OS_COMPILE_CXXFLAGS) $(CXXFLAGS) $(MOZBUILD_CXXFLAGS) $(EXTRA_COMPILE_FLAGS)
-COMPILE_CMFLAGS = $(OS_COMPILE_CMFLAGS) $(MOZBUILD_CMFLAGS) $(EXTRA_COMPILE_FLAGS)
-COMPILE_CMMFLAGS = $(OS_COMPILE_CMMFLAGS) $(MOZBUILD_CMMFLAGS) $(EXTRA_COMPILE_FLAGS)
-ASFLAGS += $(MOZBUILD_ASFLAGS) $(EXTRA_ASSEMBLER_FLAGS)
+COMPILE_CFLAGS	= $(VISIBILITY_FLAGS) $(DEFINES) $(INCLUDES) $(OS_INCLUDES) $(DSO_CFLAGS) $(DSO_PIC_CFLAGS) $(RTL_FLAGS) $(OS_CPPFLAGS) $(OS_COMPILE_CFLAGS) $(CFLAGS) $(MOZBUILD_CFLAGS)
+COMPILE_CXXFLAGS = $(if $(DISABLE_STL_WRAPPING),,$(STL_FLAGS)) $(VISIBILITY_FLAGS) $(DEFINES) $(INCLUDES) $(OS_INCLUDES) $(DSO_CFLAGS) $(DSO_PIC_CFLAGS) $(RTL_FLAGS) $(OS_CPPFLAGS) $(OS_COMPILE_CXXFLAGS) $(CXXFLAGS) $(MOZBUILD_CXXFLAGS)
+COMPILE_CMFLAGS = $(OS_COMPILE_CMFLAGS) $(MOZBUILD_CMFLAGS)
+COMPILE_CMMFLAGS = $(OS_COMPILE_CMMFLAGS) $(MOZBUILD_CMMFLAGS)
+ASFLAGS += $(MOZBUILD_ASFLAGS)

 ifndef CROSS_COMPILE
 HOST_CFLAGS += $(RTL_FLAGS)
@@ -3,11 +3,11 @@
 == bug456008.xhtml bug456008-ref.html
 == bug439965.html bug439965-ref.html
 == bug427779.xml bug427779-ref.xml
-skip-if(B2G) == bug559996.html bug559996-ref.html # bug 773482
-skip-if(B2G) == bug591981-1.html bug591981-ref.html
+skip-if(B2G||Mulet) == bug559996.html bug559996-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == bug591981-1.html bug591981-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == bug591981-2.html bug591981-ref.html
 == bug592366-1.html bug592366-ref.html
-skip-if(B2G) == bug592366-2.html bug592366-ref.html
-skip-if(B2G&&browserIsRemote) == bug592366-1.xhtml bug592366-ref.xhtml
-skip-if(B2G) == bug592366-2.xhtml bug592366-ref.xhtml
+skip-if(B2G||Mulet) == bug592366-2.html bug592366-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) == bug592366-1.xhtml bug592366-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == bug592366-2.xhtml bug592366-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
 == bug798068.xhtml bug798068-ref.xhtml
@@ -39,6 +39,7 @@
 #include "nsJSEnvironment.h"
 #include "nsJSUtils.h"

+#include "mozilla/ChaosMode.h"
 #include "mozilla/EventStateManager.h"
 #include "mozilla/MiscEvents.h"
 #include "mozilla/MouseEvents.h"
@@ -2448,6 +2449,33 @@ nsDOMWindowUtils::SetAsyncScrollOffset(nsIDOMNode* aNode,
  return NS_OK;
 }

+NS_IMETHODIMP
+nsDOMWindowUtils::SetAsyncZoom(nsIDOMNode* aRootElement, float aValue)
+{
+  nsCOMPtr<Element> element = do_QueryInterface(aRootElement);
+  if (!element) {
+    return NS_ERROR_INVALID_ARG;
+  }
+  FrameMetrics::ViewID viewId;
+  if (!nsLayoutUtils::FindIDFor(element, &viewId)) {
+    return NS_ERROR_UNEXPECTED;
+  }
+  nsIWidget* widget = GetWidget();
+  if (!widget) {
+    return NS_ERROR_FAILURE;
+  }
+  LayerManager* manager = widget->GetLayerManager();
+  if (!manager) {
+    return NS_ERROR_FAILURE;
+  }
+  ShadowLayerForwarder* forwarder = manager->AsShadowForwarder();
+  if (!forwarder || !forwarder->HasShadowManager()) {
+    return NS_ERROR_UNEXPECTED;
+  }
+  forwarder->GetShadowManager()->SendSetAsyncZoom(viewId, aValue);
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 nsDOMWindowUtils::ComputeAnimationDistance(nsIDOMElement* aElement,
                                           const nsAString& aProperty,
@@ -3746,6 +3774,22 @@ nsDOMWindowUtils::GetServiceWorkersTestingEnabled(bool *aEnabled)
  return NS_OK;
 }

+NS_IMETHODIMP
+nsDOMWindowUtils::EnterChaosMode()
+{
+  MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
+  ChaosMode::enterChaosMode();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDOMWindowUtils::LeaveChaosMode()
+{
+  MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
+  ChaosMode::leaveChaosMode();
+  return NS_OK;
+}
+
 NS_INTERFACE_MAP_BEGIN(nsTranslationNodeList)
  NS_INTERFACE_MAP_ENTRY(nsISupports)
  NS_INTERFACE_MAP_ENTRY(nsITranslationNodeList)
@@ -1,13 +1,13 @@
 default-preferences pref(dom.forms.number,true)
-skip-if(B2G) needs-focus == input-load.html input-ref.html # B2G timed out waiting for reftest-wait to be removed
-skip-if(B2G) needs-focus == input-create.html input-ref.html # B2G timed out waiting for reftest-wait to be removed
-skip-if(B2G) needs-focus == input-number.html input-number-ref.html # B2G timed out waiting for reftest-wait to be removed
-skip-if(B2G) needs-focus == button-load.html button-ref.html # B2G timed out waiting for reftest-wait to be removed
-skip-if(B2G) needs-focus == button-create.html button-ref.html # B2G timed out waiting for reftest-wait to be removed
-skip-if(B2G) needs-focus == textarea-load.html textarea-ref.html # B2G timed out waiting for reftest-wait to be removed
-skip-if(B2G) needs-focus == textarea-create.html textarea-ref.html # B2G timed out waiting for reftest-wait to be removed
-skip-if(B2G) needs-focus == select-load.html select-ref.html # B2G timed out waiting for reftest-wait to be removed
-skip-if(B2G) needs-focus == select-create.html select-ref.html # B2G timed out waiting for reftest-wait to be removed
+skip-if(B2G||Mulet) needs-focus == input-load.html input-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == input-create.html input-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == input-number.html input-number-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == button-load.html button-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == button-create.html button-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == textarea-load.html textarea-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == textarea-create.html textarea-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == select-load.html select-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == select-create.html select-ref.html # B2G timed out waiting for reftest-wait to be removed # Initial mulet triage: parity with B2G/B2G Desktop
 needs-focus == autofocus-after-load.html autofocus-after-load-ref.html
-fails-if(B2G) needs-focus == autofocus-leaves-iframe.html autofocus-leaves-iframe-ref.html # B2G focus difference between test and reference
-skip-if(B2G) needs-focus == autofocus-after-body-focus.html autofocus-after-body-focus-ref.html # bug 773482
+fails-if(B2G||Mulet) needs-focus == autofocus-leaves-iframe.html autofocus-leaves-iframe-ref.html # B2G focus difference between test and reference # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) needs-focus == autofocus-after-body-focus.html autofocus-after-body-focus-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
@@ -2,11 +2,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

-DIST_FILES = \
-  bootstrap.js \
-  install.rdf \
-  $(NULL)
-
 TEST_EXTENSIONS_DIR = $(DEPTH)/_tests/testing/mochitest/extensions

 GENERATED_DIRS = $(TEST_EXTENSIONS_DIR)
@@ -5,3 +5,8 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

 XPI_NAME = 'indexedDB'
+
+DIST_FILES += [
+    'bootstrap.js',
+    'install.rdf',
+]
@@ -49,7 +49,7 @@ interface nsIJSRAIIHelper;
 interface nsIContentPermissionRequest;
 interface nsIObserver;

-[scriptable, uuid(34a42cdc-7a04-4e71-8a5c-63e092fba58e)]
+[scriptable, uuid(098d9f0d-7809-4d3c-8fc6-e5b3fb71835b)]
 interface nsIDOMWindowUtils : nsISupports {

  /**
@@ -1430,6 +1430,14 @@ interface nsIDOMWindowUtils : nsISupports {
   */
  void setAsyncScrollOffset(in nsIDOMNode aNode, in int32_t aX, in int32_t aY);

+  /**
+   * Set async zoom value. aRootElement should be the document element of our
+   * document. The next composite will render with that zoom added to any
+   * existing zoom if async scrolling is enabled, and then the zoom will be
+   * removed. Only call this while test-controlled refreshes is enabled.
+   */
+  void setAsyncZoom(in nsIDOMNode aRootElement, in float aValue);
+
  /**
   * Method for testing StyleAnimationValue::ComputeDistance.
   *
@@ -1806,6 +1814,19 @@ interface nsIDOMWindowUtils : nsISupports {
   * Enable some service workers testing features.
   */
  attribute boolean serviceWorkersTestingEnabled;
+
+  /**
+   * Increase the chaos mode activation level. An equivalent number of
+   * calls to leaveChaosMode must be made in order to restore the original
+   * chaos mode state. If the activation level is nonzero all chaos mode
+   * features are activated.
+   */
+  void enterChaosMode();
+
+  /**
+   * Decrease the chaos mode activation level. See enterChaosMode().
+   */
+  void leaveChaosMode();
 };

 [scriptable, uuid(c694e359-7227-4392-a138-33c0cc1f15a6)]
@@ -192,9 +192,9 @@ TabChildBase::InitializeRootMetrics()
  // be keeping, as well as putting the scroll offset back to
  // the top-left of the page.
  mLastRootMetrics.SetViewport(CSSRect(CSSPoint(), kDefaultViewportSize));
-  mLastRootMetrics.mCompositionBounds = ParentLayerRect(
+  mLastRootMetrics.SetCompositionBounds(ParentLayerRect(
      ParentLayerPoint(),
-      ParentLayerSize(ViewAs<ParentLayerPixel>(mInnerSize, PixelCastJustification::ScreenIsParentLayerForRoot)));
+      ParentLayerSize(ViewAs<ParentLayerPixel>(mInnerSize, PixelCastJustification::ScreenIsParentLayerForRoot))));
  mLastRootMetrics.SetZoom(CSSToParentLayerScale2D(mLastRootMetrics.CalculateIntrinsicScale()));
  mLastRootMetrics.SetDevPixelsPerCSSPixel(WebWidget()->GetDefaultScale());
  // We use ParentLayerToLayerScale(1) below in order to turn the
@@ -330,9 +330,9 @@ TabChildBase::HandlePossibleViewportChange(const ScreenIntSize& aOldScreenSize)

  FrameMetrics metrics(mLastRootMetrics);
  metrics.SetViewport(CSSRect(CSSPoint(), viewport));
-  metrics.mCompositionBounds = ParentLayerRect(
+  metrics.SetCompositionBounds(ParentLayerRect(
      ParentLayerPoint(),
-      ParentLayerSize(ViewAs<ParentLayerPixel>(mInnerSize, PixelCastJustification::ScreenIsParentLayerForRoot)));
+      ParentLayerSize(ViewAs<ParentLayerPixel>(mInnerSize, PixelCastJustification::ScreenIsParentLayerForRoot))));
  metrics.SetRootCompositionSize(
      ScreenSize(mInnerSize) * ScreenToLayoutDeviceScale(1.0f) / metrics.GetDevPixelsPerCSSPixel());

@@ -2977,17 +2977,23 @@ TabChild::NotifyPainted()
 void
 TabChild::MakeVisible()
 {
-    if (mWidget) {
-        mWidget->Show(true);
-    }
+  CompositorChild* compositor = CompositorChild::Get();
+  compositor->SendNotifyVisible(mLayersId);
+
+  if (mWidget) {
+    mWidget->Show(true);
+  }
 }

 void
 TabChild::MakeHidden()
 {
-    if (mWidget) {
-        mWidget->Show(false);
-    }
+  CompositorChild* compositor = CompositorChild::Get();
+  compositor->SendNotifyHidden(mLayersId);
+
+  if (mWidget) {
+    mWidget->Show(false);
+  }
 }

 void
@@ -3131,6 +3137,17 @@ TabChild::DidComposite(uint64_t aTransactionId)
  manager->DidComposite(aTransactionId);
 }

+void
+TabChild::ClearCachedResources()
+{
+  MOZ_ASSERT(mWidget);
+  MOZ_ASSERT(mWidget->GetLayerManager());
+  MOZ_ASSERT(mWidget->GetLayerManager()->GetBackendType() == LayersBackend::LAYERS_CLIENT);
+
+  ClientLayerManager *manager = static_cast<ClientLayerManager*>(mWidget->GetLayerManager());
+  manager->ClearCachedResources();
+}
+
 NS_IMETHODIMP
 TabChild::OnShowTooltip(int32_t aXCoords, int32_t aYCoords, const char16_t *aTipText)
 {
@@ -475,6 +475,7 @@ public:
    static TabChild* GetFrom(uint64_t aLayersId);

    void DidComposite(uint64_t aTransactionId);
+    void ClearCachedResources();

    static inline TabChild*
    GetFrom(nsIDOMWindow* aWindow)
@@ -28,12 +28,12 @@ SOURCES += [
 # If WebRTC isn't being built, we need to compile the DirectShow base classes so that
 # they're available at link time.
 if not CONFIG['MOZ_WEBRTC']:
-    SOURCES += [ '%s/%s' % (TOPSRCDIR, p) for p in [
-        'media/webrtc/trunk/webrtc/modules/video_capture/windows/BaseFilter.cpp',
-        'media/webrtc/trunk/webrtc/modules/video_capture/windows/BaseInputPin.cpp',
-        'media/webrtc/trunk/webrtc/modules/video_capture/windows/BasePin.cpp',
-        'media/webrtc/trunk/webrtc/modules/video_capture/windows/MediaType.cpp',
-    ]]
+    SOURCES += [
+        '/media/webrtc/trunk/webrtc/modules/video_capture/windows/BaseFilter.cpp',
+        '/media/webrtc/trunk/webrtc/modules/video_capture/windows/BaseInputPin.cpp',
+        '/media/webrtc/trunk/webrtc/modules/video_capture/windows/BasePin.cpp',
+        '/media/webrtc/trunk/webrtc/modules/video_capture/windows/MediaType.cpp',
+    ]

 FAIL_ON_WARNINGS = True

@@ -68,10 +68,8 @@ if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
    ]

 if CONFIG['MOZ_ENABLE_QT']:
-    GENERATED_SOURCES += [
-        'moc_NestedLoopTimer.cpp',
-    ]
    SOURCES += [
+        '!moc_NestedLoopTimer.cpp',
        'NestedLoopTimer.cpp',
        'PluginHelperQt.cpp',
    ]
@@ -6,5 +6,5 @@

 SharedLibrary('nptestjava')

-relative_path = '..'
+relative_path = 'javaplugin'
 include('../testplugin.mozbuild')
@@ -6,5 +6,5 @@

 SharedLibrary('npsecondtest')

-relative_path = '..'
+relative_path = 'secondplugin'
 include('../testplugin.mozbuild')
@@ -6,35 +6,35 @@

 DIST_INSTALL = False

-UNIFIED_SOURCES += [ '%s/%s' % (relative_path, p) for p in [
+UNIFIED_SOURCES += [
    'nptest.cpp',
    'nptest_utils.cpp',
-]]
+]

 UNIFIED_SOURCES += [
-    'nptest_name.cpp',
+    '%s/nptest_name.cpp' % relative_path,
 ]

 toolkit = CONFIG['MOZ_WIDGET_TOOLKIT']
 if toolkit == 'cocoa':
    UNIFIED_SOURCES += [
-        relative_path + '/nptest_macosx.mm'
+        'nptest_macosx.mm'
    ]
 elif toolkit in ('gtk2', 'gtk3'):
    UNIFIED_SOURCES += [
-        relative_path + '/nptest_gtk2.cpp',
+        'nptest_gtk2.cpp',
    ]
 elif toolkit == 'android':
    UNIFIED_SOURCES += [
-        relative_path + '/nptest_droid.cpp',
+        'nptest_droid.cpp',
    ]
 elif toolkit == 'qt':
    UNIFIED_SOURCES += [
-        relative_path + '/nptest_qt.cpp',
+        'nptest_qt.cpp',
    ]
 elif toolkit == 'windows':
    UNIFIED_SOURCES += [
-        relative_path + '/nptest_windows.cpp',
+        'nptest_windows.cpp',
    ]
    OS_LIBS += [
        'msimg32',
@@ -5,10 +5,8 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

 if CONFIG['MOZ_ENABLE_QT5GEOPOSITION']:
-    GENERATED_SOURCES += [
-        'moc_QTMLocationProvider.cpp',
-    ]
    SOURCES += [
+        '!moc_QTMLocationProvider.cpp',
        'QTMLocationProvider.cpp',
    ]

@@ -2,12 +2,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

-DIST_FILES = \
-  bootstrap.js \
-  install.rdf \
-  worker.js \
-  $(NULL)
-
 TEST_EXTENSIONS_DIR = $(DEPTH)/_tests/testing/mochitest/extensions

 GENERATED_DIRS = $(TEST_EXTENSIONS_DIR)
@@ -5,3 +5,9 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

 XPI_NAME = 'workerbootstrap'
+
+DIST_FILES += [
+    'bootstrap.js',
+    'install.rdf',
+    'worker.js',
+]
@@ -2,11 +2,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

-DIST_FILES = \
-  install.rdf \
-  worker.js \
-  $(NULL)
-
 TEST_EXTENSIONS_DIR = $(DEPTH)/_tests/testing/mochitest/extensions

 GENERATED_DIRS = $(TEST_EXTENSIONS_DIR)
@@ -16,3 +16,8 @@ EXTRA_COMPONENTS += [
 ]

 XPI_NAME = 'worker'
+
+DIST_FILES += [
+    'install.rdf',
+    'worker.js',
+]
@@ -97,7 +97,7 @@ skip-if(Android||B2G) needs-focus == 462758-grabbers-resizers.html 462758-grabbe
 == 694880-3.html 694880-ref.html
 == 388980-1.html 388980-1-ref.html
 needs-focus == spellcheck-superscript-1.html spellcheck-superscript-1-ref.html
-skip-if(B2G) fails-if(Android) needs-focus != spellcheck-superscript-2.html spellcheck-superscript-2-ref.html # bug 783658
+skip-if(B2G||Mulet) fails-if(Android) needs-focus != spellcheck-superscript-2.html spellcheck-superscript-2-ref.html # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
 needs-focus pref(selectioncaret.enabled,false) == 824080-1.html 824080-1-ref.html
 needs-focus == 824080-2.html 824080-2-ref.html
 needs-focus pref(selectioncaret.enabled,false) == 824080-3.html 824080-3-ref.html
@@ -110,7 +110,7 @@ needs-focus pref(selectioncaret.enabled,false) == 824080-7.html 824080-7-ref.htm
 needs-focus != 824080-6.html 824080-7.html
 # Bug 674927: copy spellcheck-textarea tests to contenteditable
 == spellcheck-contenteditable-attr.html spellcheck-contenteditable-nofocus-ref.html
-fails-if(Android||B2G) needs-focus != spellcheck-contenteditable-attr.html spellcheck-contenteditable-ref.html # B2G no spellcheck underline
+fails-if(Android||B2G||Mulet) needs-focus != spellcheck-contenteditable-attr.html spellcheck-contenteditable-ref.html # B2G no spellcheck underline # Initial mulet triage: parity with B2G/B2G Desktop
 needs-focus == spellcheck-contenteditable-focused.html spellcheck-contenteditable-ref.html
 needs-focus == spellcheck-contenteditable-focused-reframe.html spellcheck-contenteditable-ref.html
 == spellcheck-contenteditable-nofocus.html spellcheck-contenteditable-disabled-ref.html
@@ -1,29 +1,29 @@
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == empty-1.xul empty-ref.xul # bug 783658
-skip-if(B2G&&browserIsRemote) != empty-2.xul empty-ref.xul
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == empty-1.xul empty-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) != empty-2.xul empty-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
 # There is no way to simulate an autocomplete textbox in windows XP/Vista/7 default theme using CSS.
 # Therefore, the equlity tests below should be marked as failing.
-fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if(B2G&&browserIsRemote) == autocomplete-1.xul autocomplete-ref.xul # bug 783658
-fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if(B2G&&browserIsRemote) == emptyautocomplete-1.xul emptyautocomplete-ref.xul # bug 783658
-skip-if(B2G&&browserIsRemote) != emptymultiline-1.xul emptymultiline-ref.xul
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == emptymultiline-2.xul emptymultiline-ref.xul # bug 783658
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == emptytextbox-1.xul emptytextbox-ref.xul # bug 783658
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == emptytextbox-2.xul emptytextbox-ref.xul # bug 783658
-skip-if(B2G&&browserIsRemote) != emptytextbox-3.xul emptytextbox-ref.xul
-skip-if(B2G&&browserIsRemote) != emptytextbox-4.xul emptytextbox-ref.xul
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == emptytextbox-5.xul emptytextbox-ref.xul # bug 783658
+fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if((B2G&&browserIsRemote)||Mulet) == autocomplete-1.xul autocomplete-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if((B2G&&browserIsRemote)||Mulet) == emptyautocomplete-1.xul emptyautocomplete-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) != emptymultiline-1.xul emptymultiline-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == emptymultiline-2.xul emptymultiline-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == emptytextbox-1.xul emptytextbox-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == emptytextbox-2.xul emptytextbox-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) != emptytextbox-3.xul emptytextbox-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) != emptytextbox-4.xul emptytextbox-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == emptytextbox-5.xul emptytextbox-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
 # There is no way to simulate a number textbox in windows XP/Vista/7 default theme using CSS.
 # Therefore, the equlity tests below should be marked as failing.
-skip-if(B2G&&browserIsRemote) != number-1.xul number-ref.xul
-skip-if(B2G&&browserIsRemote) != number-2.xul number-ref.xul
-fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if(B2G&&browserIsRemote) == number-3.xul number-ref.xul # bug 783658
-skip-if(B2G&&browserIsRemote) != number-4.xul number-ref.xul
-fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if(B2G&&browserIsRemote) == number-5.xul number-ref.xul # bug 783658
-fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if(B2G&&browserIsRemote) == numberwithvalue-1.xul numberwithvalue-ref.xul # bug 783658
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == passwd-1.xul passwd-ref.xul # bug 783658
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == passwd-2.xul passwd-ref.xul # bug 783658
-skip-if(B2G&&browserIsRemote) != passwd-3.xul passwd-ref.xul
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == plain-1.xul plain-ref.xul # bug 783658
-fails-if(Android||B2G) skip-if(B2G&&browserIsRemote) == textbox-1.xul textbox-ref.xul
-skip-if(B2G&&browserIsRemote) != textbox-disabled.xul textbox-ref.xul
+skip-if((B2G&&browserIsRemote)||Mulet) != number-1.xul number-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) != number-2.xul number-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if((B2G&&browserIsRemote)||Mulet) == number-3.xul number-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) != number-4.xul number-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if((B2G&&browserIsRemote)||Mulet) == number-5.xul number-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) fails-if(windowsDefaultTheme&&/^Windows\x20NT\x20(5\.[12]|6\.[012])/.test(http.oscpu)) skip-if((B2G&&browserIsRemote)||Mulet) == numberwithvalue-1.xul numberwithvalue-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == passwd-1.xul passwd-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == passwd-2.xul passwd-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) != passwd-3.xul passwd-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == plain-1.xul plain-ref.xul # bug 783658 # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G) skip-if((B2G&&browserIsRemote)||Mulet) == textbox-1.xul textbox-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) != textbox-disabled.xul textbox-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
 # Read-only textboxes look like normal textboxes in windows Vista/7 default theme
-fails-if(windowsDefaultTheme&&/^Windows\x20NT\x206\.[012]/.test(http.oscpu)) skip-if(B2G&&browserIsRemote) != textbox-readonly.xul textbox-ref.xul
+fails-if(windowsDefaultTheme&&/^Windows\x20NT\x206\.[012]/.test(http.oscpu)) skip-if((B2G&&browserIsRemote)||Mulet) != textbox-readonly.xul textbox-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
@@ -732,6 +732,7 @@ struct ParamTraits<mozilla::layers::FrameMetrics>
    WriteParam(aMsg, aParam.GetLineScrollAmount());
    WriteParam(aMsg, aParam.GetPageScrollAmount());
    WriteParam(aMsg, aParam.AllowVerticalScrollWithWheel());
+    WriteParam(aMsg, aParam.mClipRect);
    WriteParam(aMsg, aParam.GetContentDescription());
  }

@@ -774,6 +775,7 @@ struct ParamTraits<mozilla::layers::FrameMetrics>
            ReadParam(aMsg, aIter, &aResult->mLineScrollAmount) &&
            ReadParam(aMsg, aIter, &aResult->mPageScrollAmount) &&
            ReadParam(aMsg, aIter, &aResult->mAllowVerticalScrollWithWheel) &&
+            ReadParam(aMsg, aIter, &aResult->mClipRect) &&
            ReadContentDescription(aMsg, aIter, aResult));
  }
 };
@@ -8,6 +8,7 @@

 #include <stdint.h>                     // for uint32_t, uint64_t
 #include "Units.h"                      // for CSSRect, CSSPixel, etc
+#include "mozilla/Maybe.h"
 #include "mozilla/gfx/BasePoint.h"      // for BasePoint
 #include "mozilla/gfx/Rect.h"           // for RoundedIn
 #include "mozilla/gfx/ScaleFactor.h"    // for ScaleFactor
@@ -39,8 +40,8 @@ public:
  static const FrameMetrics sNullMetrics;   // We often need an empty metrics

  FrameMetrics()
-    : mCompositionBounds(0, 0, 0, 0)
-    , mPresShellResolution(1)
+    : mPresShellResolution(1)
+    , mCompositionBounds(0, 0, 0, 0)
    , mDisplayPort(0, 0, 0, 0)
    , mCriticalDisplayPort(0, 0, 0, 0)
    , mScrollableRect(0, 0, 0, 0)
@@ -98,7 +99,8 @@ public:
           mDoSmoothScroll == aOther.mDoSmoothScroll &&
           mLineScrollAmount == aOther.mLineScrollAmount &&
           mPageScrollAmount == aOther.mPageScrollAmount &&
-           mAllowVerticalScrollWithWheel == aOther.mAllowVerticalScrollWithWheel;
+           mAllowVerticalScrollWithWheel == aOther.mAllowVerticalScrollWithWheel &&
+           mClipRect == aOther.mClipRect;
  }
  bool operator!=(const FrameMetrics& aOther) const
  {
@@ -239,27 +241,6 @@ public:
    return copy;
  }

-  // ---------------------------------------------------------------------------
-  // The following metrics are all in widget space/device pixels.
-  //
-
-  // This is the area within the widget that we're compositing to. It is in the
-  // same coordinate space as the reference frame for the scrolled frame.
-  //
-  // This is useful because, on mobile, the viewport and composition dimensions
-  // are not always the same. In this case, we calculate the displayport using
-  // an area bigger than the region we're compositing to. If we used the
-  // viewport dimensions to calculate the displayport, we'd run into situations
-  // where we're prerendering the wrong regions and the content may be clipped,
-  // or too much of it prerendered. If the composition dimensions are the same as the
-  // viewport dimensions, there is no need for this and we can just use the viewport
-  // instead.
-  //
-  // This value is valid for nested scrollable layers as well, and is still
-  // relative to the layer tree origin. This value is provided by Gecko at
-  // layout/paint time.
-  ParentLayerRect mCompositionBounds;
-
 public:
  void SetPresShellResolution(float aPresShellResolution)
  {
@@ -271,12 +252,22 @@ public:
    return mPresShellResolution;
  }

+  void SetCompositionBounds(const ParentLayerRect& aCompositionBounds)
+  {
+    mCompositionBounds = aCompositionBounds;
+  }
+
+  const ParentLayerRect& GetCompositionBounds() const
+  {
+    return mCompositionBounds;
+  }
+
  void SetDisplayPort(const CSSRect& aDisplayPort)
  {
    mDisplayPort = aDisplayPort;
  }

-  CSSRect GetDisplayPort() const
+  const CSSRect& GetDisplayPort() const
  {
    return mDisplayPort;
  }
@@ -286,7 +277,7 @@ public:
    mCriticalDisplayPort = aCriticalDisplayPort;
  }

-  CSSRect GetCriticalDisplayPort() const
+  const CSSRect& GetCriticalDisplayPort() const
  {
    return mCriticalDisplayPort;
  }
@@ -296,7 +287,7 @@ public:
    mCumulativeResolution = aCumulativeResolution;
  }

-  LayoutDeviceToLayerScale2D GetCumulativeResolution() const
+  const LayoutDeviceToLayerScale2D& GetCumulativeResolution() const
  {
    return mCumulativeResolution;
  }
@@ -306,7 +297,7 @@ public:
    mDevPixelsPerCSSPixel = aDevPixelsPerCSSPixel;
  }

-  CSSToLayoutDeviceScale GetDevPixelsPerCSSPixel() const
+  const CSSToLayoutDeviceScale& GetDevPixelsPerCSSPixel() const
  {
    return mDevPixelsPerCSSPixel;
  }
@@ -356,7 +347,7 @@ public:
    mZoom = aZoom;
  }

-  CSSToParentLayerScale2D GetZoom() const
+  const CSSToParentLayerScale2D& GetZoom() const
  {
    return mZoom;
  }
@@ -463,7 +454,7 @@ public:
    mExtraResolution = aExtraResolution;
  }

-  ScreenToLayerScale2D GetExtraResolution() const
+  const ScreenToLayerScale2D& GetExtraResolution() const
  {
    return mExtraResolution;
  }
@@ -528,6 +519,21 @@ public:
    mAllowVerticalScrollWithWheel = true;
  }

+  void SetClipRect(const Maybe<ParentLayerIntRect>& aClipRect)
+  {
+    mClipRect = aClipRect;
+  }
+  const Maybe<ParentLayerIntRect>& GetClipRect() const
+  {
+    return mClipRect;
+  }
+  bool HasClipRect() const {
+    return mClipRect.isSome();
+  }
+  const ParentLayerIntRect& ClipRect() const {
+    return mClipRect.ref();
+  }
+
 private:

  // The pres-shell resolution that has been induced on the document containing
@@ -539,6 +545,23 @@ private:
  // it does not convert between any coordinate spaces for which we have names.
  float mPresShellResolution;

+  // This is the area within the widget that we're compositing to. It is in the
+  // same coordinate space as the reference frame for the scrolled frame.
+  //
+  // This is useful because, on mobile, the viewport and composition dimensions
+  // are not always the same. In this case, we calculate the displayport using
+  // an area bigger than the region we're compositing to. If we used the
+  // viewport dimensions to calculate the displayport, we'd run into situations
+  // where we're prerendering the wrong regions and the content may be clipped,
+  // or too much of it prerendered. If the composition dimensions are the same
+  // as the viewport dimensions, there is no need for this and we can just use
+  // the viewport instead.
+  //
+  // This value is valid for nested scrollable layers as well, and is still
+  // relative to the layer tree origin. This value is provided by Gecko at
+  // layout/paint time.
+  ParentLayerRect mCompositionBounds;
+
  // The area of a frame's contents that has been painted, relative to
  // mCompositionBounds.
  //
@@ -681,6 +704,19 @@ private:

  // Whether or not the frame can be vertically scrolled with a mouse wheel.
  bool mAllowVerticalScrollWithWheel;
+
+  // The clip rect to use when compositing a layer with this FrameMetrics.
+  Maybe<ParentLayerIntRect> mClipRect;
+
+  // WARNING!!!!
+  //
+  // When adding new fields to FrameMetrics, the following places should be
+  // updated to include them (as needed):
+  //    FrameMetrics::operator ==
+  //    AsyncPanZoomController::NotifyLayersUpdated
+  //    The ParamTraits specialization in GfxMessageUtils.h
+  //
+  // Please add new fields above this comment.
 };

 /**
@@ -926,6 +926,27 @@ Layer::GetVisibleRegionRelativeToRootLayer(nsIntRegion& aResult,
  return true;
 }

+Maybe<ParentLayerIntRect>
+Layer::GetCombinedClipRect() const
+{
+  Maybe<ParentLayerIntRect> clip = GetClipRect();
+
+  for (size_t i = 0; i < mFrameMetrics.Length(); i++) {
+    if (!mFrameMetrics[i].HasClipRect()) {
+      continue;
+    }
+
+    const ParentLayerIntRect& other = mFrameMetrics[i].ClipRect();
+    if (clip) {
+      clip = Some(clip.value().Intersect(other));
+    } else {
+      clip = Some(other);
+    }
+  }
+
+  return clip;
+}
+
 ContainerLayer::ContainerLayer(LayerManager* aManager, void* aImplData)
  : Layer(aManager, aImplData),
    mFirstChild(nullptr),
@@ -1249,6 +1249,12 @@ public:
  bool IsScrollbarContainer() { return mIsScrollbarContainer; }
  Layer* GetMaskLayer() const { return mMaskLayer; }

+  /*
+   * Get the combined clip rect of the Layer clip and all clips on FrameMetrics.
+   * This is intended for use in Layout. The compositor needs to apply async
+   * transforms to find the combined clip.
+   */
+  Maybe<ParentLayerIntRect> GetCombinedClipRect() const;

  /**
   * Retrieve the root level visible region for |this| taking into account
@@ -1704,8 +1710,10 @@ protected:
  nsAutoPtr<StickyPositionData> mStickyPositionData;
  FrameMetrics::ViewID mScrollbarTargetId;
  ScrollDirection mScrollbarDirection;
-  float mScrollbarThumbRatio; // Ratio of the thumb position to the scroll
-                              // position, in app units.
+  // The scrollbar thumb ratio is the ratio of the thumb position (in the CSS
+  // pixels of the scrollframe's parent's space) to the scroll position (in the
+  // CSS pixels of the scrollframe's space).
+  float mScrollbarThumbRatio;
  bool mIsScrollbarContainer;
  DebugOnly<uint32_t> mDebugColorIndex;
  // If this layer is used for OMTA, then this counter is used to ensure we
@@ -169,7 +169,7 @@ AppendToString(std::stringstream& aStream, const FrameMetrics& m,
               const char* pfx, const char* sfx, bool detailed)
 {
  aStream << pfx;
-  AppendToString(aStream, m.mCompositionBounds, "{ [cb=");
+  AppendToString(aStream, m.GetCompositionBounds(), "{ [cb=");
  AppendToString(aStream, m.GetScrollableRect(), "] [sr=");
  AppendToString(aStream, m.GetScrollOffset(), "] [s=");
  if (m.GetDoSmoothScroll()) {
@@ -183,6 +183,9 @@ AppendToString(std::stringstream& aStream, const FrameMetrics& m,
    if (m.GetScrollParentId() != FrameMetrics::NULL_SCROLL_ID) {
      AppendToString(aStream, m.GetScrollParentId(), "] [scrollParent=");
    }
+    if (m.HasClipRect()) {
+      AppendToString(aStream, m.ClipRect(), "] [clip=");
+    }
    AppendToString(aStream, m.GetZoom(), "] [z=", "] }");
  } else {
    AppendToString(aStream, m.GetDisplayPortMargins(), " [dpm=");
@@ -209,7 +209,7 @@ ComputeClipRegion(GeckoContentController* aController,
    // root scrollable layer in a process, or for some of the LayerMetrics
    // expansions of a multi-metrics layer), fall back to using the comp
    // bounds which should be equivalent.
-    clipRegion = RoundedToInt(aLayer.Metrics().mCompositionBounds);
+    clipRegion = RoundedToInt(aLayer.Metrics().GetCompositionBounds());
  }

  // Optionally, the GeckoContentController can provide a touch-sensitive
@@ -244,7 +244,8 @@ APZCTreeManager::PrintAPZCInfo(const LayerMetricsWrapper& aLayer,
                               const AsyncPanZoomController* apzc)
 {
  const FrameMetrics& metrics = aLayer.Metrics();
-  mApzcTreeLog << "APZC " << apzc->GetGuid() << "\tcb=" << metrics.mCompositionBounds
+  mApzcTreeLog << "APZC " << apzc->GetGuid()
+               << "\tcb=" << metrics.GetCompositionBounds()
               << "\tsr=" << metrics.GetScrollableRect()
               << (aLayer.IsScrollInfoLayer() ? "\tscrollinfo" : "")
               << (apzc->HasScrollgrab() ? "\tscrollgrab" : "") << "\t"
@@ -272,7 +273,7 @@ GetEventRegions(const LayerMetricsWrapper& aLayer)
 {
  if (aLayer.IsScrollInfoLayer()) {
    return EventRegions(nsIntRegion(ParentLayerIntRect::ToUntyped(
-      RoundedToInt(aLayer.Metrics().mCompositionBounds))));
+      RoundedToInt(aLayer.Metrics().GetCompositionBounds()))));
  }
  return aLayer.GetEventRegions();
 }
@@ -1302,6 +1303,10 @@ APZCTreeManager::BuildOverscrollHandoffChain(const nsRefPtr<AsyncPanZoomControll
      continue;
    }

+    // Guard against a possible infinite-loop condition. If we hit this, the
+    // layout code that generates the handoff parents did something wrong.
+    MOZ_ASSERT(apzc->GetScrollHandoffParentId() != apzc->GetGuid().mScrollId);
+
    // Find the AsyncPanZoomController instance with a matching layersId and
    // the scroll id that matches apzc->GetScrollHandoffParentId(). To do this
    // search the subtree with the same layersId for the apzc with the specified
@@ -1282,7 +1282,9 @@ nsEventStatus AsyncPanZoomController::OnScaleBegin(const PinchGestureInput& aEve
  }

  SetState(PINCHING);
-  mLastZoomFocus = aEvent.mLocalFocusPoint - mFrameMetrics.mCompositionBounds.TopLeft();
+  mX.SetVelocity(0);
+  mY.SetVelocity(0);
+  mLastZoomFocus = aEvent.mLocalFocusPoint - mFrameMetrics.GetCompositionBounds().TopLeft();

  return nsEventStatus_eConsumeNoDefault;
 }
@@ -1318,7 +1320,7 @@ nsEventStatus AsyncPanZoomController::OnScale(const PinchGestureInput& aEvent) {
    ReentrantMonitorAutoEnter lock(mMonitor);

    CSSToParentLayerScale userZoom = mFrameMetrics.GetZoom().ToScaleFactor();
-    ParentLayerPoint focusPoint = aEvent.mLocalFocusPoint - mFrameMetrics.mCompositionBounds.TopLeft();
+    ParentLayerPoint focusPoint = aEvent.mLocalFocusPoint - mFrameMetrics.GetCompositionBounds().TopLeft();
    CSSPoint cssFocusPoint = focusPoint / mFrameMetrics.GetZoom();

    CSSPoint focusChange = (mLastZoomFocus - focusPoint) / userZoom;
@@ -1336,9 +1338,9 @@ nsEventStatus AsyncPanZoomController::OnScale(const PinchGestureInput& aEvent) {
    CSSToParentLayerScale realMinZoom = mZoomConstraints.mMinZoom;
    CSSToParentLayerScale realMaxZoom = mZoomConstraints.mMaxZoom;
    realMinZoom.scale = std::max(realMinZoom.scale,
-                                 mFrameMetrics.mCompositionBounds.width / mFrameMetrics.GetScrollableRect().width);
+                                 mFrameMetrics.GetCompositionBounds().width / mFrameMetrics.GetScrollableRect().width);
    realMinZoom.scale = std::max(realMinZoom.scale,
-                                 mFrameMetrics.mCompositionBounds.height / mFrameMetrics.GetScrollableRect().height);
+                                 mFrameMetrics.GetCompositionBounds().height / mFrameMetrics.GetScrollableRect().height);
    if (realMaxZoom < realMinZoom) {
      realMaxZoom = realMinZoom;
    }
@@ -1833,7 +1835,7 @@ bool AsyncPanZoomController::Contains(const ScreenIntPoint& aPoint) const
  ParentLayerIntRect cb;
  {
    ReentrantMonitorAutoEnter lock(mMonitor);
-    GetFrameMetrics().mCompositionBounds.ToIntRect(&cb);
+    GetFrameMetrics().GetCompositionBounds().ToIntRect(&cb);
  }
  return cb.Contains(point);
 }
@@ -2738,9 +2740,11 @@ ViewTransform AsyncPanZoomController::GetCurrentAsyncTransform() const {
  }

  ParentLayerPoint translation = (currentScrollOffset - lastPaintScrollOffset)
-                               * mFrameMetrics.GetZoom();
+                               * mFrameMetrics.GetZoom() * mTestAsyncZoom.scale;

-  return ViewTransform(mFrameMetrics.GetAsyncZoom(), -translation);
+  return ViewTransform(
+    LayerToParentLayerScale(mFrameMetrics.GetAsyncZoom().scale * mTestAsyncZoom.scale),
+    -translation);
 }

 Matrix4x4 AsyncPanZoomController::GetCurrentAsyncTransformWithOverscroll() const {
@@ -2797,8 +2801,8 @@ void AsyncPanZoomController::NotifyLayersUpdated(const FrameMetrics& aLayerMetri
  mPaintThrottler.TaskComplete(GetFrameTime());
  bool needContentRepaint = false;
  bool viewportUpdated = false;
-  if (FuzzyEqualsAdditive(aLayerMetrics.mCompositionBounds.width, mFrameMetrics.mCompositionBounds.width) &&
-      FuzzyEqualsAdditive(aLayerMetrics.mCompositionBounds.height, mFrameMetrics.mCompositionBounds.height)) {
+  if (FuzzyEqualsAdditive(aLayerMetrics.GetCompositionBounds().width, mFrameMetrics.GetCompositionBounds().width) &&
+      FuzzyEqualsAdditive(aLayerMetrics.GetCompositionBounds().height, mFrameMetrics.GetCompositionBounds().height)) {
    // Remote content has sync'd up to the composition geometry
    // change, so we can accept the viewport it's calculated.
    if (mFrameMetrics.GetViewport().width != aLayerMetrics.GetViewport().width ||
@@ -2844,7 +2848,7 @@ void AsyncPanZoomController::NotifyLayersUpdated(const FrameMetrics& aLayerMetri
    // in some things into our local mFrameMetrics because these things are
    // determined by Gecko and our copy in mFrameMetrics may be stale.

-    if (FuzzyEqualsAdditive(mFrameMetrics.mCompositionBounds.width, aLayerMetrics.mCompositionBounds.width) &&
+    if (FuzzyEqualsAdditive(mFrameMetrics.GetCompositionBounds().width, aLayerMetrics.GetCompositionBounds().width) &&
        mFrameMetrics.GetDevPixelsPerCSSPixel() == aLayerMetrics.GetDevPixelsPerCSSPixel() &&
        !viewportUpdated) {
      // Any change to the pres shell resolution was requested by APZ and is
@@ -2870,11 +2874,14 @@ void AsyncPanZoomController::NotifyLayersUpdated(const FrameMetrics& aLayerMetri
      mFrameMetrics.SetScrollableRect(aLayerMetrics.GetScrollableRect());
      needContentRepaint = true;
    }
-    mFrameMetrics.mCompositionBounds = aLayerMetrics.mCompositionBounds;
+    mFrameMetrics.SetCompositionBounds(aLayerMetrics.GetCompositionBounds());
    mFrameMetrics.SetRootCompositionSize(aLayerMetrics.GetRootCompositionSize());
    mFrameMetrics.SetPresShellResolution(aLayerMetrics.GetPresShellResolution());
    mFrameMetrics.SetCumulativeResolution(aLayerMetrics.GetCumulativeResolution());
    mFrameMetrics.SetHasScrollgrab(aLayerMetrics.GetHasScrollgrab());
+    mFrameMetrics.SetLineScrollAmount(aLayerMetrics.GetLineScrollAmount());
+    mFrameMetrics.SetPageScrollAmount(aLayerMetrics.GetPageScrollAmount());
+    mFrameMetrics.SetClipRect(aLayerMetrics.GetClipRect());

    if (scrollOffsetUpdated) {
      APZC_LOG("%p updating scroll offset from %s to %s\n", this,
@@ -2971,7 +2978,7 @@ void AsyncPanZoomController::ZoomToRect(CSSRect aRect) {
  {
    ReentrantMonitorAutoEnter lock(mMonitor);

-    ParentLayerRect compositionBounds = mFrameMetrics.mCompositionBounds;
+    ParentLayerRect compositionBounds = mFrameMetrics.GetCompositionBounds();
    CSSRect cssPageRect = mFrameMetrics.GetScrollableRect();
    CSSPoint scrollOffset = mFrameMetrics.GetScrollOffset();
    CSSToParentLayerScale currentZoom = mFrameMetrics.GetZoom().ToScaleFactor();
@@ -1058,6 +1058,13 @@ public:
  {
    mTestAsyncScrollOffset = aPoint;
  }
+  /**
+   * Set an extra offset for testing async scrolling.
+   */
+  void SetTestAsyncZoom(const LayerToParentLayerScale& aZoom)
+  {
+    mTestAsyncZoom = aZoom;
+  }

  void MarkAsyncTransformAppliedToContent()
  {
@@ -1072,6 +1079,8 @@ public:
 private:
  // Extra offset to add in SampleContentTransformForFrame for testing
  CSSPoint mTestAsyncScrollOffset;
+  // Extra zoom to include in SampleContentTransformForFrame for testing
+  LayerToParentLayerScale mTestAsyncZoom;
  // Flag to track whether or not the APZ transform is not used. This
  // flag is recomputed for every composition frame.
  bool mAsyncTransformAppliedToContent;
@@ -496,7 +496,7 @@ ParentLayerCoord Axis::GetOrigin() const {
 }

 ParentLayerCoord Axis::GetCompositionLength() const {
-  return GetRectLength(GetFrameMetrics().mCompositionBounds);
+  return GetRectLength(GetFrameMetrics().GetCompositionBounds());
 }

 ParentLayerCoord Axis::GetPageStart() const {
@@ -511,7 +511,7 @@ ParentLayerCoord Axis::GetPageLength() const {

 bool Axis::ScaleWillOverscrollBothSides(float aScale) const {
  const FrameMetrics& metrics = GetFrameMetrics();
-  ParentLayerRect screenCompositionBounds = metrics.mCompositionBounds
+  ParentLayerRect screenCompositionBounds = metrics.GetCompositionBounds()
                                          / ParentLayerToParentLayerScale(aScale);
  return GetRectLength(screenCompositionBounds) - GetPageLength() > COORDINATE_EPSILON;
 }
@@ -176,7 +176,7 @@ ClientTiledPaintedLayer::BeginPaint()
  if (!hasTransformAnimation) {
    ParentLayerRect criticalDisplayPort =
      (displayportMetrics.GetCriticalDisplayPort() * displayportMetrics.GetZoom())
-      + displayportMetrics.mCompositionBounds.TopLeft();
+      + displayportMetrics.GetCompositionBounds().TopLeft();
    mPaintData.mCriticalDisplayPort = RoundedToInt(
      ApplyParentLayerToLayerTransform(transformDisplayPortToLayer, criticalDisplayPort));
  }
@@ -193,7 +193,7 @@ ClientTiledPaintedLayer::BeginPaint()
  gfx::Matrix4x4 transformToBounds = mPaintData.mTransformToCompBounds;
  transformToBounds.Invert();
  mPaintData.mCompositionBounds = ApplyParentLayerToLayerTransform(
-    transformToBounds, scrollMetrics.mCompositionBounds);
+    transformToBounds, scrollMetrics.GetCompositionBounds());
  TILING_LOG("TILING %p: Composition bounds %s\n", this, Stringify(mPaintData.mCompositionBounds).c_str());

  // Calculate the scroll offset since the last transaction
@@ -1330,7 +1330,7 @@ GetCompositorSideCompositionBounds(const LayerMetricsWrapper& aScrollAncestor,
 {
  Matrix4x4 transform = aTransformToCompBounds * Matrix4x4(aAPZTransform);
  return TransformTo<LayerPixel>(transform.Inverse(),
-            aScrollAncestor.Metrics().mCompositionBounds);
+            aScrollAncestor.Metrics().GetCompositionBounds());
 }

 bool
@@ -600,12 +600,34 @@ AsyncCompositionManager::ApplyAsyncContentTransformToTree(Layer *aLayer)
    // When doing so, it might be useful to look at how it was called here before
    // bug 1036967 removed the (dead) call.

+#if defined(MOZ_ANDROID_APZ)
+    if (mIsFirstPaint) {
+      CSSToLayerScale geckoZoom = metrics.LayersPixelsPerCSSPixel().ToScaleFactor();
+      LayerIntPoint scrollOffsetLayerPixels = RoundedToInt(metrics.GetScrollOffset() * geckoZoom);
+      mContentRect = metrics.GetScrollableRect();
+      SetFirstPaintViewport(scrollOffsetLayerPixels,
+                            geckoZoom,
+                            mContentRect);
+    }
+#endif
+
    mIsFirstPaint = false;
    mLayersUpdated = false;

    // Apply the render offset
    mLayerManager->GetCompositor()->SetScreenRenderOffset(offset);

+    // See the comment below - the first FrameMetrics has the clip computed
+    // by layout (currently, effectively the composition bounds), which we
+    // intersect here to include the layer clip.
+    if (i == 0 && metrics.HasClipRect()) {
+      if (clipRect) {
+        clipRect = Some(clipRect.value().Intersect(metrics.ClipRect()));
+      } else {
+        clipRect = Some(metrics.ClipRect());
+      }
+    }
+
    combinedAsyncTransformWithoutOverscroll *= asyncTransformWithoutOverscroll;
    combinedAsyncTransform *= (Matrix4x4(asyncTransformWithoutOverscroll) * overscrollTransform);
    if (i > 0 && clipRect) {
@@ -625,7 +647,7 @@ AsyncCompositionManager::ApplyAsyncContentTransformToTree(Layer *aLayer)
      ParentLayerRect transformed = TransformTo<ParentLayerPixel>(
        (Matrix4x4(asyncTransformWithoutOverscroll) * overscrollTransform),
        ParentLayerRect(*clipRect));
-      clipRect = Some(RoundedOut(transformed.Intersect(metrics.mCompositionBounds)));
+      clipRect = Some(RoundedOut(transformed.Intersect(metrics.GetCompositionBounds())));
    }
  }

@@ -717,11 +739,13 @@ ApplyAsyncTransformToScrollbarForContent(Layer* aScrollbar,
    // |metrics.CalculateCompositedSizeInCssPixels()| would not give a correct
    // result.
    const CSSToParentLayerScale effectiveZoom(metrics.GetZoom().yScale * asyncZoomY);
-    const CSSCoord compositedHeight = (metrics.mCompositionBounds / effectiveZoom).height;
-    const CSSCoord scrollableHeight = metrics.GetScrollableRect().height;

-    // The scrollbar thumb ratio is in AppUnits.
-    const float ratio = aScrollbar->GetScrollbarThumbRatio();
+    const LayoutDeviceToParentLayerScale nonLayoutScale = effectiveZoom /
+        metrics.GetDevPixelsPerCSSPixel();
+    // Here we convert the scrollbar thumb ratio into a true unitless ratio by
+    // dividing out the conversion factor from the scrollframe's parent's space
+    // to the scrollframe's space.
+    const float ratio = aScrollbar->GetScrollbarThumbRatio() / nonLayoutScale.scale;
    ParentLayerCoord yTranslation = -asyncScrollY * ratio;

    // The scroll thumb additionally needs to be translated to compensate for
@@ -735,7 +759,7 @@ ApplyAsyncTransformToScrollbarForContent(Layer* aScrollbar,
    // a change of basis. We have a method to help with that,
    // Matrix4x4::ChangeBasis(), but it wouldn't necessarily make the code
    // cleaner in this case).
-    const CSSCoord thumbOrigin = (metrics.GetScrollOffset().y / scrollableHeight) * compositedHeight;
+    const CSSCoord thumbOrigin = (metrics.GetScrollOffset().y * ratio);
    const CSSCoord thumbOriginScaled = thumbOrigin * yScale;
    const CSSCoord thumbOriginDelta = thumbOriginScaled - thumbOrigin;
    const ParentLayerCoord thumbOriginDeltaPL = thumbOriginDelta * effectiveZoom;
@@ -764,14 +788,13 @@ ApplyAsyncTransformToScrollbarForContent(Layer* aScrollbar,
    const float xScale = 1.f / asyncZoomX;

    const CSSToParentLayerScale effectiveZoom(metrics.GetZoom().xScale * asyncZoomX);
-    const CSSCoord compositedWidth = (metrics.mCompositionBounds / effectiveZoom).width;
-    const CSSCoord scrollableWidth = metrics.GetScrollableRect().width;

-    // The scrollbar thumb ratio is in AppUnits.
-    const float ratio = aScrollbar->GetScrollbarThumbRatio();
+    const LayoutDeviceToParentLayerScale nonLayoutScale = effectiveZoom /
+        metrics.GetDevPixelsPerCSSPixel();
+    const float ratio = aScrollbar->GetScrollbarThumbRatio() / nonLayoutScale.scale;
    ParentLayerCoord xTranslation = -asyncScrollX * ratio;

-    const CSSCoord thumbOrigin = (metrics.GetScrollOffset().x / scrollableWidth) * compositedWidth;
+    const CSSCoord thumbOrigin = (metrics.GetScrollOffset().x * ratio);
    const CSSCoord thumbOriginScaled = thumbOrigin * xScale;
    const CSSCoord thumbOriginDelta = thumbOriginScaled - thumbOrigin;
    const ParentLayerCoord thumbOriginDeltaPL = thumbOriginDelta * effectiveZoom;
@@ -981,28 +1004,28 @@ AsyncCompositionManager::TransformScrollableLayer(Layer* aLayer)
  Point3D overscrollTranslation;
  if (userScroll.x < contentScreenRect.x) {
    overscrollTranslation.x = contentScreenRect.x - userScroll.x;
-  } else if (userScroll.x + metrics.mCompositionBounds.width > contentScreenRect.XMost()) {
+  } else if (userScroll.x + metrics.GetCompositionBounds().width > contentScreenRect.XMost()) {
    overscrollTranslation.x = contentScreenRect.XMost() -
-      (userScroll.x + metrics.mCompositionBounds.width);
+      (userScroll.x + metrics.GetCompositionBounds().width);
  }
  if (userScroll.y < contentScreenRect.y) {
    overscrollTranslation.y = contentScreenRect.y - userScroll.y;
-  } else if (userScroll.y + metrics.mCompositionBounds.height > contentScreenRect.YMost()) {
+  } else if (userScroll.y + metrics.GetCompositionBounds().height > contentScreenRect.YMost()) {
    overscrollTranslation.y = contentScreenRect.YMost() -
-      (userScroll.y + metrics.mCompositionBounds.height);
+      (userScroll.y + metrics.GetCompositionBounds().height);
  }
  oldTransform.PreTranslate(overscrollTranslation.x,
                            overscrollTranslation.y,
                            overscrollTranslation.z);

  gfx::Size underZoomScale(1.0f, 1.0f);
-  if (mContentRect.width * userZoom.scale < metrics.mCompositionBounds.width) {
+  if (mContentRect.width * userZoom.scale < metrics.GetCompositionBounds().width) {
    underZoomScale.width = (mContentRect.width * userZoom.scale) /
-      metrics.mCompositionBounds.width;
+      metrics.GetCompositionBounds().width;
  }
-  if (mContentRect.height * userZoom.scale < metrics.mCompositionBounds.height) {
+  if (mContentRect.height * userZoom.scale < metrics.GetCompositionBounds().height) {
    underZoomScale.height = (mContentRect.height * userZoom.scale) /
-      metrics.mCompositionBounds.height;
+      metrics.GetCompositionBounds().height;
  }
  oldTransform.PreScale(underZoomScale.width, underZoomScale.height, 1);

@@ -240,17 +240,21 @@ ContainerPrepare(ContainerT* aContainer,
  for (uint32_t i = 0; i < children.Length(); i++) {
    LayerComposite* layerToRender = static_cast<LayerComposite*>(children.ElementAt(i)->ImplData());

-    if (layerToRender->GetLayer()->GetEffectiveVisibleRegion().IsEmpty() &&
-        !layerToRender->GetLayer()->AsContainerLayer()) {
-      CULLING_LOG("Sublayer %p has no effective visible region\n", layerToRender->GetLayer());
-      continue;
-    }
-
    RenderTargetIntRect clipRect = layerToRender->GetLayer()->
        CalculateScissorRect(aClipRect);
-    if (clipRect.IsEmpty()) {
-      CULLING_LOG("Sublayer %p has an empty world clip rect\n", layerToRender->GetLayer());
-      continue;
+
+    // We don't want to skip container layers because otherwise their mPrepared
+    // may be null which is not allowed.
+    if (!layerToRender->GetLayer()->AsContainerLayer()) {
+      if (layerToRender->GetLayer()->GetEffectiveVisibleRegion().IsEmpty()) {
+        CULLING_LOG("Sublayer %p has no effective visible region\n", layerToRender->GetLayer());
+        continue;
+      }
+
+      if (clipRect.IsEmpty()) {
+        CULLING_LOG("Sublayer %p has an empty world clip rect\n", layerToRender->GetLayer());
+        continue;
+      }
    }

    CULLING_LOG("Preparing sublayer %p\n", layerToRender->GetLayer());
@@ -318,7 +322,8 @@ RenderLayers(ContainerT* aContainer,
    Layer* layer = layerToRender->GetLayer();

    gfxRGBA color;
-    if (LayerHasCheckerboardingAPZC(layer, &color)) {
+    if ((layer->GetContentFlags() & Layer::CONTENT_OPAQUE) &&
+        LayerHasCheckerboardingAPZC(layer, &color)) {
      // Ideally we would want to intersect the checkerboard region from the APZ with the layer bounds
      // and only fill in that area. However the layer bounds takes into account the base translation
      // for the painted layer whereas the checkerboard region does not. One does not simply
@@ -358,17 +363,26 @@ RenderLayers(ContainerT* aContainer,
    }

    // Draw a border around scrollable layers.
-    for (uint32_t i = 0; i < layer->GetFrameMetricsCount(); i++) {
-      // A layer can be scrolled by multiple scroll frames. Draw a border
-      // for each.
-      if (layer->GetFrameMetrics(i).IsScrollable()) {
+    // A layer can be scrolled by multiple scroll frames. Draw a border
+    // for each.
+    // Within the list of scroll frames for a layer, the layer border for a
+    // scroll frame lower down is affected by the async transforms on scroll
+    // frames higher up, so loop from the top down, and accumulate an async
+    // transform as we go along.
+    Matrix4x4 asyncTransform;
+    for (uint32_t i = layer->GetFrameMetricsCount(); i > 0; --i) {
+      if (layer->GetFrameMetrics(i - 1).IsScrollable()) {
        // Since the composition bounds are in the parent layer's coordinates,
        // use the parent's effective transform rather than the layer's own.
-        ParentLayerRect compositionBounds = layer->GetFrameMetrics(i).mCompositionBounds;
+        ParentLayerRect compositionBounds = layer->GetFrameMetrics(i - 1).GetCompositionBounds();
        aManager->GetCompositor()->DrawDiagnostics(DiagnosticFlags::CONTAINER,
                                                   compositionBounds.ToUnknownRect(),
                                                   gfx::Rect(aClipRect.ToUnknownRect()),
-                                                   aContainer->GetEffectiveTransform());
+                                                   asyncTransform * aContainer->GetEffectiveTransform());
+        if (AsyncPanZoomController* apzc = layer->GetAsyncPanZoomController(i - 1)) {
+          asyncTransform = apzc->GetCurrentAsyncTransformWithOverscroll()
+                         * asyncTransform;
+        }
      }
    }

@@ -1075,7 +1075,7 @@ LayerManagerComposite::ComputeRenderIntegrity()
    // the root layer.
    rootMetrics = LayerMetricsWrapper(root).Metrics();
  }
-  ParentLayerIntRect bounds = RoundedToInt(rootMetrics.mCompositionBounds);
+  ParentLayerIntRect bounds = RoundedToInt(rootMetrics.GetCompositionBounds());
  IntRect screenRect(bounds.x,
                       bounds.y,
                       bounds.width,
@@ -373,6 +373,16 @@ CompositorChild::AddOverfillObserver(ClientLayerManager* aLayerManager)
  mOverfillObservers.AppendElement(aLayerManager);
 }

+bool
+CompositorChild::RecvClearCachedResources(const uint64_t& aId)
+{
+  dom::TabChild* child = dom::TabChild::GetFrom(aId);
+  if (child) {
+    child->ClearCachedResources();
+  }
+  return true;
+}
+
 void
 CompositorChild::ActorDestroy(ActorDestroyReason aWhy)
 {
@@ -550,6 +560,26 @@ CompositorChild::SendResume()
  return PCompositorChild::SendResume();
 }

+bool
+CompositorChild::SendNotifyHidden(const uint64_t& id)
+{
+  MOZ_ASSERT(mCanSend);
+  if (!mCanSend) {
+    return true;
+  }
+  return PCompositorChild::SendNotifyHidden(id);
+}
+
+bool
+CompositorChild::SendNotifyVisible(const uint64_t& id)
+{
+  MOZ_ASSERT(mCanSend);
+  if (!mCanSend) {
+    return true;
+  }
+  return PCompositorChild::SendNotifyVisible(id);
+}
+
 bool
 CompositorChild::SendNotifyChildCreated(const uint64_t& id)
 {
@@ -70,6 +70,9 @@ public:

  void AddOverfillObserver(ClientLayerManager* aLayerManager);

+  virtual bool
+  RecvClearCachedResources(const uint64_t& id) override;
+
  virtual bool
  RecvDidComposite(const uint64_t& aId, const uint64_t& aTransactionId) override;

@@ -106,6 +109,8 @@ public:
  bool SendWillStop();
  bool SendPause();
  bool SendResume();
+  bool SendNotifyHidden(const uint64_t& id);
+  bool SendNotifyVisible(const uint64_t& id);
  bool SendNotifyChildCreated(const uint64_t& id);
  bool SendAdoptChild(const uint64_t& id);
  bool SendMakeSnapshot(const SurfaceDescriptor& inSnapshot, const gfx::IntRect& dirtyRect);
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "CompositorLRU.h"
+
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/unused.h"
+
+#include "CompositorParent.h"
+
+namespace mozilla {
+namespace layers {
+
+mozilla::StaticRefPtr<CompositorLRU> CompositorLRU::sSingleton;
+
+void
+CompositorLRU::Init()
+{
+  unused << GetSingleton();
+}
+
+CompositorLRU*
+CompositorLRU::GetSingleton()
+{
+  if (sSingleton) {
+    return sSingleton;
+  }
+  sSingleton = new CompositorLRU();
+  ClearOnShutdown(&sSingleton);
+
+  return sSingleton;
+}
+
+CompositorLRU::CompositorLRU()
+{
+  mLRUSize = Preferences::GetUint("layers.compositor-lru-size", uint32_t(0));
+}
+
+CompositorLRU::~CompositorLRU()
+{
+}
+
+void
+CompositorLRU::Add(PCompositorParent* aCompositor, const uint64_t& aId)
+{
+  auto index = mLRU.IndexOf(std::make_pair(aCompositor, aId));
+  if (index != nsTArray<CompositorLayerPair>::NoIndex) {
+    return;
+  }
+
+  if (mLRUSize == 0) {
+    unused << aCompositor->SendClearCachedResources(aId);
+    return;
+  }
+
+  if (mLRU.Length() == mLRUSize) {
+    CompositorLayerPair victim = mLRU.LastElement();
+    unused << victim.first->SendClearCachedResources(victim.second);
+    mLRU.RemoveElement(victim);
+  }
+  mLRU.InsertElementAt(0, std::make_pair(aCompositor, aId));
+}
+
+void
+CompositorLRU::Remove(PCompositorParent* aCompositor, const uint64_t& aId)
+{
+  if (mLRUSize == 0) {
+    return;
+  }
+
+  auto index = mLRU.IndexOf(std::make_pair(aCompositor, aId));
+
+  if (index == nsTArray<PCompositorParent*>::NoIndex) {
+    return;
+  }
+
+  mLRU.RemoveElementAt(index);
+}
+
+void
+CompositorLRU::Remove(PCompositorParent* aCompositor)
+{
+  if (mLRUSize == 0) {
+    return;
+  }
+
+  for (int32_t i = mLRU.Length() - 1; i >= 0; --i) {
+    if (mLRU[i].first == aCompositor) {
+      mLRU.RemoveElementAt(i);
+    }
+  }
+}
+
+} // namespace layers
+} // namespace mozilla
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_CompositorLRU_h
+#define mozilla_CompositorLRU_h
+
+#include "mozilla/StaticPtr.h"
+
+#include "nsISupportsImpl.h"
+#include "nsTArray.h"
+
+#include <utility>
+
+namespace mozilla {
+namespace layers {
+
+class PCompositorParent;
+
+class CompositorLRU final
+{
+  typedef std::pair<PCompositorParent*, uint64_t> CompositorLayerPair;
+public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorLRU)
+
+  static void Init();
+  static CompositorLRU* GetSingleton();
+
+  /**
+   * Adds the (PCompositorParent, LayerId) pair to the LRU pool. If
+   * the pool size grows over mLRUSize, the oldest PCompositorParent
+   * is evicted.
+   */
+  void Add(PCompositorParent* aCompositor, const uint64_t& id);
+
+  /**
+   * Remove the (PCompositorParent, LayersId) pair from the LRU pool.
+   */
+  void Remove(PCompositorParent* aCompositor, const uint64_t& id);
+
+  /**
+   * Remove all PCompositorParents from the LRU pool.
+   */
+  void Remove(PCompositorParent* aCompositor);
+
+private:
+  static StaticRefPtr<CompositorLRU> sSingleton;
+
+  CompositorLRU();
+  ~CompositorLRU();
+  uint32_t mLRUSize;
+  nsTArray<CompositorLayerPair> mLRU;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // mozilla_CompositorLRU_h
@@ -34,6 +34,7 @@
 #include "mozilla/layers/AsyncCompositionManager.h"
 #include "mozilla/layers/BasicCompositor.h"  // for BasicCompositor
 #include "mozilla/layers/Compositor.h"  // for Compositor
+#include "mozilla/layers/CompositorLRU.h"  // for CompositorLRU
 #include "mozilla/layers/CompositorOGL.h"  // for CompositorOGL
 #include "mozilla/layers/CompositorTypes.h"
 #include "mozilla/layers/LayerManagerComposite.h"
@@ -1670,6 +1671,8 @@ public:
  virtual bool RecvStop() override { return true; }
  virtual bool RecvPause() override { return true; }
  virtual bool RecvResume() override { return true; }
+  virtual bool RecvNotifyHidden(const uint64_t& id) override;
+  virtual bool RecvNotifyVisible(const uint64_t& id) override;
  virtual bool RecvNotifyChildCreated(const uint64_t& child) override;
  virtual bool RecvAdoptChild(const uint64_t& child) override { return false; }
  virtual bool RecvMakeSnapshot(const SurfaceDescriptor& aInSnapshot,
@@ -1825,6 +1828,22 @@ CompositorParent::GetIndirectShadowTree(uint64_t aId)
  return &cit->second;
 }

+bool
+CrossProcessCompositorParent::RecvNotifyHidden(const uint64_t& id)
+{
+  nsRefPtr<CompositorLRU> lru = CompositorLRU::GetSingleton();
+  lru->Add(this, id);
+  return true;
+}
+
+bool
+CrossProcessCompositorParent::RecvNotifyVisible(const uint64_t& id)
+{
+  nsRefPtr<CompositorLRU> lru = CompositorLRU::GetSingleton();
+  lru->Remove(this, id);
+  return true;
+}
+
 bool
 CrossProcessCompositorParent::RecvRequestNotifyAfterRemotePaint()
 {
@@ -1835,6 +1854,9 @@ CrossProcessCompositorParent::RecvRequestNotifyAfterRemotePaint()
 void
 CrossProcessCompositorParent::ActorDestroy(ActorDestroyReason aWhy)
 {
+  nsRefPtr<CompositorLRU> lru = CompositorLRU::GetSingleton();
+  lru->Remove(this);
+
  MessageLoop::current()->PostTask(
    FROM_HERE,
    NewRunnableMethod(this, &CrossProcessCompositorParent::DeferredDestroy));
@@ -234,6 +234,8 @@ public:
  virtual bool RecvStop() override;
  virtual bool RecvPause() override;
  virtual bool RecvResume() override;
+  virtual bool RecvNotifyHidden(const uint64_t& id) override { return true; }
+  virtual bool RecvNotifyVisible(const uint64_t& id) override { return true; }
  virtual bool RecvNotifyChildCreated(const uint64_t& child) override;
  virtual bool RecvAdoptChild(const uint64_t& child) override;
  virtual bool RecvMakeSnapshot(const SurfaceDescriptor& aInSnapshot,
@@ -783,6 +783,22 @@ LayerTransactionParent::RecvSetAsyncScrollOffset(const FrameMetrics::ViewID& aSc
  return true;
 }

+bool
+LayerTransactionParent::RecvSetAsyncZoom(const FrameMetrics::ViewID& aScrollID,
+                                         const float& aValue)
+{
+  if (mDestroyed || !layer_manager() || layer_manager()->IsDestroyed()) {
+    return false;
+  }
+
+  AsyncPanZoomController* controller = GetAPZCForViewID(mRoot, aScrollID);
+  if (!controller) {
+    return false;
+  }
+  controller->SetTestAsyncZoom(LayerToParentLayerScale(aValue));
+  return true;
+}
+
 bool
 LayerTransactionParent::RecvGetAPZTestData(APZTestData* aOutData)
 {
@@ -133,6 +133,8 @@ protected:
                                         override;
  virtual bool RecvSetAsyncScrollOffset(const FrameMetrics::ViewID& aId,
                                        const int32_t& aX, const int32_t& aY) override;
+  virtual bool RecvSetAsyncZoom(const FrameMetrics::ViewID& aId,
+                                const float& aValue) override;
  virtual bool RecvGetAPZTestData(APZTestData* aOutData) override;
  virtual bool RecvRequestProperty(const nsString& aProperty, float* aValue) override;
  virtual bool RecvSetConfirmedTargetAPZC(const uint64_t& aBlockId,
@@ -70,6 +70,12 @@ child:
   */
  async UpdatePluginVisibility(uintptr_t[] aVisibleIdList);

+  /**
+   * Drop any buffers that might be retained on the child compositor
+   * side.
+   */
+  async ClearCachedResources(uint64_t id);
+
 parent:
  // Child sends the parent a request for fill ratio numbers.
  async RequestOverfill();
@@ -85,6 +91,14 @@ parent:
  sync Pause();
  sync Resume();

+  // The child layer tree is hidden. id is the layers id of the child
+  // layer tree.
+  async NotifyHidden(uint64_t id);
+
+  // The child layer tree is visible. id is the layers id of the child
+  // layer tree.
+  async NotifyVisible(uint64_t id);
+
  async NotifyChildCreated(uint64_t id);
  async AdoptChild(uint64_t id);

@@ -89,6 +89,11 @@ parent:
  // Useful for testing rendering of async scrolling.
  sync SetAsyncScrollOffset(ViewID id, int32_t x, int32_t y);

+  // The next time the layer tree is composited, include this async zoom in
+  // for the given ViewID.
+  // Useful for testing rendering of async zooming.
+  sync SetAsyncZoom(ViewID id, float zoom);
+
  // Drop any front buffers that might be retained on the compositor
  // side.
  async ClearCachedResources();
@@ -136,6 +136,7 @@ EXPORTS.mozilla.layers += [
    'ipc/CompositableForwarder.h',
    'ipc/CompositableTransactionParent.h',
    'ipc/CompositorChild.h',
+    'ipc/CompositorLRU.h',
    'ipc/CompositorParent.h',
    'ipc/FenceUtils.h',
    'ipc/ImageBridgeChild.h',
@@ -288,6 +289,7 @@ UNIFIED_SOURCES += [
    'ipc/CompositableTransactionParent.cpp',
    'ipc/CompositorBench.cpp',
    'ipc/CompositorChild.cpp',
+    'ipc/CompositorLRU.cpp',
    'ipc/CompositorParent.cpp',
    'ipc/FenceUtils.cpp',
    'ipc/ImageBridgeChild.cpp',
@@ -228,7 +228,7 @@ TestFrameMetrics()
  FrameMetrics fm;

  fm.SetDisplayPort(CSSRect(0, 0, 10, 10));
-  fm.mCompositionBounds = ParentLayerRect(0, 0, 10, 10);
+  fm.SetCompositionBounds(ParentLayerRect(0, 0, 10, 10));
  fm.SetCriticalDisplayPort(CSSRect(0, 0, 10, 10));
  fm.SetScrollableRect(CSSRect(0, 0, 100, 100));

@@ -610,7 +610,7 @@ protected:
  FrameMetrics GetPinchableFrameMetrics()
  {
    FrameMetrics fm;
-    fm.mCompositionBounds = ParentLayerRect(200, 200, 100, 200);
+    fm.SetCompositionBounds(ParentLayerRect(200, 200, 100, 200));
    fm.SetScrollableRect(CSSRect(0, 0, 980, 1000));
    fm.SetScrollOffset(CSSPoint(300, 300));
    fm.SetZoom(CSSToParentLayerScale2D(2.0, 2.0));
@@ -754,7 +754,7 @@ TEST_F(APZCPinchGestureDetectorTester, Pinch_PreventDefault) {
 TEST_F(APZCBasicTester, Overzoom) {
  // the visible area of the document in CSS pixels is x=10 y=0 w=100 h=100
  FrameMetrics fm;
-  fm.mCompositionBounds = ParentLayerRect(0, 0, 100, 100);
+  fm.SetCompositionBounds(ParentLayerRect(0, 0, 100, 100));
  fm.SetScrollableRect(CSSRect(0, 0, 125, 150));
  fm.SetScrollOffset(CSSPoint(10, 0));
  fm.SetZoom(CSSToParentLayerScale2D(1.0, 1.0));
@@ -822,7 +822,7 @@ TEST_F(APZCBasicTester, ComplexTransform) {
  nsRefPtr<Layer> root = CreateLayerTree(layerTreeSyntax, layerVisibleRegion, transforms, lm, layers);

  FrameMetrics metrics;
-  metrics.mCompositionBounds = ParentLayerRect(0, 0, 24, 24);
+  metrics.SetCompositionBounds(ParentLayerRect(0, 0, 24, 24));
  metrics.SetDisplayPort(CSSRect(-1, -1, 6, 6));
  metrics.SetScrollOffset(CSSPoint(10, 10));
  metrics.SetScrollableRect(CSSRect(0, 0, 50, 50));
@@ -1689,8 +1689,8 @@ protected:
    FrameMetrics metrics;
    metrics.SetScrollId(aScrollId);
    IntRect layerBound = aLayer->GetVisibleRegion().GetBounds();
-    metrics.mCompositionBounds = ParentLayerRect(layerBound.x, layerBound.y,
-                                                 layerBound.width, layerBound.height);
+    metrics.SetCompositionBounds(ParentLayerRect(layerBound.x, layerBound.y,
+                                                 layerBound.width, layerBound.height));
    metrics.SetScrollableRect(aScrollableRect);
    metrics.SetScrollOffset(CSSPoint(0, 0));
    aLayer->SetFrameMetrics(metrics);
@@ -29,7 +29,7 @@ UNIFIED_SOURCES += [
 # Because of gkmedia on windows we won't find these
 # symbols in xul.dll.
 if CONFIG['MOZ_WIDGET_TOOLKIT'] != 'windows':
-    UNIFIED_SOURCES += [ '%s/gfx/2d/unittest/%s' % (TOPSRCDIR, p) for p in [
+    UNIFIED_SOURCES += [ '/gfx/2d/unittest/%s' % p for p in [
        'TestBase.cpp',
        'TestBugs.cpp',
        'TestPoint.cpp',
@@ -8,7 +8,7 @@
 # internal linkage. Components that use frozen (external) linkage should use
 # unicharutil_external_s.

-DIRS += ['internal']
+DIRS += ['internal', 'standalone']

 EXPORTS += [
    'GreekCasing.h',
@@ -22,6 +22,6 @@ intl_unicharutil_util_lcppsrcs += [
 ]

 intl_unicharutil_util_cppsrcs = [
-    '%s/intl/unicharutil/util/%s' % (TOPSRCDIR, s) \
+    '/intl/unicharutil/util/%s' % s
        for s in intl_unicharutil_util_lcppsrcs
 ]
@@ -0,0 +1,16 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+if CONFIG['OS_TARGET'] != 'WINNT' and CONFIG['MOZ_WIDGET_TOOLKIT'] != 'gonk':
+    Library('unicharutil_standalone')
+
+UNIFIED_SOURCES += [
+    '../nsUnicodeProperties.cpp',
+]
+
+for var in ('MOZILLA_INTERNAL_API', 'MOZILLA_XPCOMRT_API', 'MOZILLA_EXTERNAL_LINKAGE',
+            'NR_SOCKET_IS_VOID_PTR', 'HAVE_STRDUP'):
+    DEFINES[var] = True
@@ -198,11 +198,9 @@ if os_linux:
        ]
    if CONFIG['MOZ_ENABLE_QT']:
        SOURCES += [
+            '!moc_message_pump_qt.cc',
            'src/base/message_pump_qt.cc',
        ]
-        GENERATED_SOURCES += [
-            'moc_message_pump_qt.cc',
-        ]
    if not CONFIG['MOZ_NATIVE_LIBEVENT']:
        if CONFIG['OS_TARGET'] != 'Android':
            SOURCES += [
@@ -235,11 +233,9 @@ if os_bsd:
        ]
    if CONFIG['MOZ_ENABLE_QT']:
        SOURCES += [
+            '!moc_message_pump_qt.cc',
            'src/base/message_pump_qt.cc',
        ]
-        GENERATED_SOURCES += [
-            'moc_message_pump_qt.cc',
-        ]
    if not CONFIG['MOZ_NATIVE_LIBEVENT']:
        SOURCES += [
            'src/third_party/libevent/kqueue.c',
@@ -12,6 +12,7 @@

 #include "mozilla/ArrayUtils.h"
 #include "mozilla/DebugOnly.h"
+#include "mozilla/Maybe.h"
 #include "mozilla/TimeStamp.h"
 #ifdef XP_WIN
 #include "mozilla/TimeStamp_windows.h"
@@ -805,6 +806,40 @@ struct ParamTraits<nsIWidget::TouchPointerState>
 {
 };

+template<class T>
+struct ParamTraits< mozilla::Maybe<T> >
+{
+  typedef mozilla::Maybe<T> paramType;
+
+  static void Write(Message* msg, const paramType& param)
+  {
+    if (param.isSome()) {
+      WriteParam(msg, true);
+      WriteParam(msg, param.value());
+    } else {
+      WriteParam(msg, false);
+    }
+  }
+
+  static bool Read(const Message* msg, void** iter, paramType* result)
+  {
+    bool isSome;
+    if (!ReadParam(msg, iter, &isSome)) {
+      return false;
+    }
+    if (isSome) {
+      T tmp;
+      if (!ReadParam(msg, iter, &tmp)) {
+        return false;
+      }
+      *result = mozilla::Some(mozilla::Move(tmp));
+    } else {
+      *result = mozilla::Nothing();
+    }
+    return true;
+  }
+};
+
 } /* namespace IPC */

 #endif /* __IPC_GLUE_IPCMESSAGEUTILS_H__ */
@@ -55,14 +55,11 @@ if CONFIG['OS_ARCH'] == 'Linux':
    ]

 SOURCES += [
+    '!IPDLUnitTests.cpp',
    'IPDLUnitTestProcessChild.cpp',
    'IPDLUnitTestSubprocess.cpp',
 ]

-GENERATED_SOURCES += [
-    'IPDLUnitTests.cpp',
-]
-
 IPDL_SOURCES += [
    'PTestActorPunning.ipdl',
    'PTestActorPunningPunned.ipdl',
@@ -4262,8 +4262,6 @@ ContainerState::SetupScrollingMetadata(NewLayerEntry* aEntry)
  }
  uint32_t baseLength = metricsArray.Length();

-  ParentLayerIntRect tmpClipRect;
-  const ParentLayerIntRect* layerClip = aEntry->mLayer->GetClipRect().ptrOr(nullptr);
  nsIFrame* fParent;
  for (const nsIFrame* f = aEntry->mAnimatedGeometryRoot;
       f != mContainerAnimatedGeometryRoot;
@@ -4288,23 +4286,9 @@ ContainerState::SetupScrollingMetadata(NewLayerEntry* aEntry)
      continue;
    }

-    Maybe<nsRect> clipRect;
    scrollFrame->ComputeFrameMetrics(aEntry->mLayer, mContainerReferenceFrame,
-                                     mParameters, &clipRect, &metricsArray);
-    if (clipRect) {
-      ParentLayerIntRect pixClip = ViewAs<ParentLayerPixel>(ScaleToNearestPixels(*clipRect));
-      if (layerClip) {
-        tmpClipRect.IntersectRect(pixClip, *layerClip);
-      } else {
-        tmpClipRect = pixClip;
-      }
-      layerClip = &tmpClipRect;
-      // XXX this could cause IPC churn due to cliprects being updated
-      // twice during layer building --- for non-PaintedLayers that have
-      // both CSS and scroll clipping.
-    }
+                                     mParameters, &metricsArray);
  }
-  aEntry->mLayer->SetClipRect(ToMaybe(layerClip));
  // Watch out for FrameMetrics copies in profiles
  aEntry->mLayer->SetFrameMetrics(metricsArray);
 }
@@ -4342,6 +4326,15 @@ InvalidateVisibleBoundsChangesForScrolledLayer(PaintedLayer* aLayer)
  }
 }

+static inline const Maybe<ParentLayerIntRect>&
+GetStationaryClipInContainer(Layer* aLayer)
+{
+  if (size_t metricsCount = aLayer->GetFrameMetricsCount()) {
+    return aLayer->GetFrameMetrics(metricsCount - 1).GetClipRect();
+  }
+  return aLayer->GetClipRect();
+}
+
 void
 ContainerState::PostprocessRetainedLayers(nsIntRegion* aOpaqueRegionForContainer)
 {
@@ -4368,7 +4361,7 @@ ContainerState::PostprocessRetainedLayers(nsIntRegion* aOpaqueRegionForContainer
    if (hideAll) {
      e->mVisibleRegion.SetEmpty();
    } else if (!e->mLayer->IsScrollbarContainer()) {
-      const Maybe<ParentLayerIntRect>& clipRect = e->mLayer->GetClipRect();
+      const Maybe<ParentLayerIntRect>& clipRect = GetStationaryClipInContainer(e->mLayer);
      if (clipRect && opaqueRegionForContainer >= 0 &&
          opaqueRegions[opaqueRegionForContainer].mOpaqueRegion.Contains(ParentLayerIntRect::ToUntyped(*clipRect))) {
        e->mVisibleRegion.SetEmpty();
@@ -4408,7 +4401,7 @@ ContainerState::PostprocessRetainedLayers(nsIntRegion* aOpaqueRegionForContainer
      }

      nsIntRegion clippedOpaque = e->mOpaqueRegion;
-      const Maybe<ParentLayerIntRect>& clipRect = e->mLayer->GetClipRect();
+      Maybe<ParentLayerIntRect> clipRect = e->mLayer->GetCombinedClipRect();
      if (clipRect) {
        clippedOpaque.AndWith(ParentLayerIntRect::ToUntyped(*clipRect));
      }
@@ -4597,7 +4590,9 @@ ChooseScaleAndSetTransform(FrameLayerBuilder* aLayerBuilder,
    if (aContainerFrame->GetContent() &&
        nsLayoutUtils::HasAnimationsForCompositor(
          aContainerFrame->GetContent(), eCSSProperty_transform)) {
-      scale = nsLayoutUtils::ComputeSuitableScaleForAnimation(aContainerFrame->GetContent());
+      scale = nsLayoutUtils::ComputeSuitableScaleForAnimation(
+                aContainerFrame->GetContent(), aVisibleRect.Size(),
+                aContainerFrame->PresContext()->GetVisibleArea().Size());
    } else {
      // Scale factors are normalized to a power of 2 to reduce the number of resolution changes
      scale = RoundToFloatPrecision(ThebesMatrix(transform2d).ScaleFactors(true));
@@ -1558,7 +1558,7 @@ already_AddRefed<LayerManager> nsDisplayList::PaintRoot(nsDisplayListBuilder* aB
                         presShell->GetRootScrollFrame(),
                         content,
                         aBuilder->FindReferenceFrameFor(frame),
-                         root, FrameMetrics::NULL_SCROLL_ID, viewport,
+                         root, FrameMetrics::NULL_SCROLL_ID, viewport, Nothing(),
                         isRoot, containerParameters));
  }

@@ -4139,7 +4139,7 @@ nsDisplaySubDocument::ComputeFrameMetrics(Layer* aLayer,
  return MakeUnique<FrameMetrics>(
    nsLayoutUtils::ComputeFrameMetrics(
      mFrame, rootScrollFrame, rootScrollFrame->GetContent(), ReferenceFrame(),
-      aLayer, mScrollParentId, viewport,
+      aLayer, mScrollParentId, viewport, Nothing(),
      isRootContentDocument, params));
 }

@@ -4411,7 +4411,7 @@ nsDisplayScrollInfoLayer::ComputeFrameMetrics(Layer* aLayer,
    nsLayoutUtils::ComputeFrameMetrics(
      mScrolledFrame, mScrollFrame, mScrollFrame->GetContent(),
      ReferenceFrame(), aLayer,
-      mScrollParentId, viewport, false, params)));
+      mScrollParentId, viewport, Nothing(), false, params)));
 }


@@ -480,18 +480,16 @@ GetScaleForValue(const StyleAnimationValue& aValue, nsIFrame* aFrame)
 }

 static float
-GetSuitableScale(float aMaxScale, float aMinScale)
+GetSuitableScale(float aMaxScale, float aMinScale,
+                 nscoord aVisibleDimension, nscoord aDisplayDimension)
 {
-  // If the minimum scale >= 1.0f, use it; if the maximum <= 1.0f, use it;
-  // otherwise use 1.0f.
-  if (aMinScale >= 1.0f) {
-    return aMinScale;
-  }
-  else if (aMaxScale <= 1.0f) {
-    return aMaxScale;
-  }
-
-  return 1.0f;
+  float displayVisibleRatio = float(aDisplayDimension) /
+                              float(aVisibleDimension);
+  // We want to rasterize based on the largest scale used during the
+  // transform animation, unless that would make us rasterize something
+  // larger than the screen.  But we never want to go smaller than the
+  // minimum scale over the animation.
+  return std::max(std::min(aMaxScale, displayVisibleRatio), aMinScale);
 }

 static void
@@ -530,7 +528,9 @@ GetMinAndMaxScaleForAnimationProperty(nsIContent* aContent,
 }

 gfxSize
-nsLayoutUtils::ComputeSuitableScaleForAnimation(nsIContent* aContent)
+nsLayoutUtils::ComputeSuitableScaleForAnimation(nsIContent* aContent,
+                                                const nsSize& aVisibleSize,
+                                                const nsSize& aDisplaySize)
 {
  gfxSize maxScale(std::numeric_limits<gfxFloat>::min(),
                   std::numeric_limits<gfxFloat>::min());
@@ -555,11 +555,13 @@ nsLayoutUtils::ComputeSuitableScaleForAnimation(nsIContent* aContent)

  if (maxScale.width == std::numeric_limits<gfxFloat>::min()) {
    // We didn't encounter a transform
-    maxScale = minScale = gfxSize(1.0, 1.0);
+    return gfxSize(1.0, 1.0);
  }

-  return gfxSize(GetSuitableScale(maxScale.width, minScale.width),
-                 GetSuitableScale(maxScale.height, minScale.height));
+  return gfxSize(GetSuitableScale(maxScale.width, minScale.width,
+                                  aVisibleSize.width, aDisplaySize.width),
+                 GetSuitableScale(maxScale.height, minScale.height,
+                                  aVisibleSize.height, aDisplaySize.height));
 }

 bool
@@ -2847,10 +2849,10 @@ CalculateFrameMetricsForDisplayPort(nsIScrollableFrame* aScrollFrame) {
  } else {
    compBoundsScale = cumulativeResolution * layerToParentLayerScale;
  }
-  metrics.mCompositionBounds
-      = LayoutDeviceRect::FromAppUnits(nsRect(nsPoint(0, 0), compositionSize),
+  metrics.SetCompositionBounds(
+      LayoutDeviceRect::FromAppUnits(nsRect(nsPoint(0, 0), compositionSize),
                                       presContext->AppUnitsPerDevPixel())
-      * compBoundsScale;
+      * compBoundsScale);

  metrics.SetRootCompositionSize(
      nsLayoutUtils::CalculateRootCompositionSize(frame, false, metrics));
@@ -3054,6 +3056,19 @@ nsLayoutUtils::PaintFrame(nsRenderingContext* aRenderingContext, nsIFrame* aFram
        }
      }
    }
+#if !defined(MOZ_WIDGET_ANDROID) || defined(MOZ_ANDROID_APZ)
+    else if (presShell->GetDocument() && presShell->GetDocument()->IsRootDisplayDocument()
+        && !presShell->GetRootScrollFrame()) {
+      // In cases where the root document is a XUL document, we want to take
+      // the ViewID from the root element, as that will be the ViewID of the
+      // root APZC in the tree. Skip doing this in cases where we know
+      // nsGfxScrollFrame::BuilDisplayList will do it instead.
+      if (dom::Element* element = presShell->GetDocument()->GetDocumentElement()) {
+        id = nsLayoutUtils::FindOrCreateIDFor(element);
+      }
+    }
+#endif
+
    nsDisplayListBuilder::AutoCurrentScrollParentIdSetter idSetter(&builder, id);

    PROFILER_LABEL("nsLayoutUtils", "PaintFrame::BuildDisplayList",
@@ -4069,10 +4084,10 @@ GetPercentBSize(const nsStyleCoord& aStyle,
    f = f->GetParent();
  }

-  bool isVertical = f->GetWritingMode().IsVertical();
+  WritingMode wm = f->GetWritingMode();

  const nsStylePosition *pos = f->StylePosition();
-  const nsStyleCoord bSizeCoord = isVertical ? pos->mWidth : pos->mHeight;
+  const nsStyleCoord& bSizeCoord = pos->BSize(wm);
  nscoord h;
  if (!GetAbsoluteCoord(bSizeCoord, h) &&
      !GetPercentBSize(bSizeCoord, f, h)) {
@@ -4093,16 +4108,15 @@ GetPercentBSize(const nsStyleCoord& aStyle,
    NS_ASSERTION(bSizeCoord.GetUnit() == eStyleUnit_Auto,
                 "Unexpected block-size unit for viewport or canvas or page-content");
    // For the viewport, canvas, and page-content kids, the percentage
-    // basis is just the parent height.
-    h = isVertical ? f->GetSize().width : f->GetSize().height;
+    // basis is just the parent block-size.
+    h = f->BSize(wm);
    if (h == NS_UNCONSTRAINEDSIZE) {
      // We don't have a percentage basis after all
      return false;
    }
  }

-  const nsStyleCoord& maxBSizeCoord =
-    isVertical ? pos->mMaxWidth : pos->mMaxHeight;
+  const nsStyleCoord& maxBSizeCoord = pos->MaxBSize(wm);

  nscoord maxh;
  if (GetAbsoluteCoord(maxBSizeCoord, maxh) ||
@@ -4115,8 +4129,7 @@ GetPercentBSize(const nsStyleCoord& aStyle,
                 "unknown max block-size unit");
  }

-  const nsStyleCoord& minBSizeCoord =
-    isVertical ? pos->mMinWidth : pos->mMinHeight;
+  const nsStyleCoord& minBSizeCoord = pos->MinBSize(wm);

  nscoord minh;
  if (GetAbsoluteCoord(minBSizeCoord, minh) ||
@@ -4267,12 +4280,9 @@ nsLayoutUtils::IntrinsicForContainer(nsRenderingContext *aRenderingContext,
  const nsStylePosition *stylePos = aFrame->StylePosition();
  uint8_t boxSizing = stylePos->mBoxSizing;

-  const nsStyleCoord &styleISize =
-    isVertical ? stylePos->mHeight : stylePos->mWidth;
-  const nsStyleCoord &styleMinISize =
-    isVertical ? stylePos->mMinHeight : stylePos->mMinWidth;
-  const nsStyleCoord &styleMaxISize =
-    isVertical ? stylePos->mMaxHeight : stylePos->mMaxWidth;
+  const nsStyleCoord& styleISize = stylePos->ISize(wm);
+  const nsStyleCoord& styleMinISize = stylePos->MinISize(wm);
+  const nsStyleCoord& styleMaxISize = stylePos->MaxISize(wm);

  // We build up two values starting with the content box, and then
  // adding padding, border and margin.  The result is normally
@@ -4351,12 +4361,9 @@ nsLayoutUtils::IntrinsicForContainer(nsRenderingContext *aRenderingContext,
    // since that's what it means in all cases except for on flex items -- and
    // even there, we're supposed to ignore it (i.e. treat it as 0) until the
    // flex container explicitly considers it.
-    const nsStyleCoord &styleBSize =
-      isVertical ? stylePos->mWidth : stylePos->mHeight;
-    const nsStyleCoord &styleMinBSize =
-      isVertical ? stylePos->mMinWidth : stylePos->mMinHeight;
-    const nsStyleCoord &styleMaxBSize =
-      isVertical ? stylePos->mMaxWidth : stylePos->mMaxHeight;
+    const nsStyleCoord& styleBSize = stylePos->BSize(wm);
+    const nsStyleCoord& styleMinBSize = stylePos->MinBSize(wm);
+    const nsStyleCoord& styleMaxBSize = stylePos->MaxBSize(wm);

    if (styleBSize.GetUnit() != eStyleUnit_Auto ||
        !(styleMinBSize.GetUnit() == eStyleUnit_Auto ||
@@ -4372,23 +4379,16 @@ nsLayoutUtils::IntrinsicForContainer(nsRenderingContext *aRenderingContext,
        case NS_STYLE_BOX_SIZING_BORDER: {
          const nsStyleBorder* styleBorder = aFrame->StyleBorder();
          bSizeTakenByBoxSizing +=
-            isVertical ? styleBorder->GetComputedBorder().LeftRight()
-                       : styleBorder->GetComputedBorder().TopBottom();
+            wm.IsVertical() ? styleBorder->GetComputedBorder().LeftRight()
+                            : styleBorder->GetComputedBorder().TopBottom();
          // fall through
        }
        case NS_STYLE_BOX_SIZING_PADDING: {
          if (!(aFlags & IGNORE_PADDING)) {
-            const nsStylePadding* stylePadding = aFrame->StylePadding();
-            const nsStyleCoord& paddingStart =
-              isVertical ? wm.IsVerticalRL()
-                           ? stylePadding->mPadding.GetRight()
-                           : stylePadding->mPadding.GetLeft()
-                         : stylePadding->mPadding.GetTop();
-            const nsStyleCoord& paddingEnd =
-              isVertical ? wm.IsVerticalRL()
-                           ? stylePadding->mPadding.GetLeft()
-                           : stylePadding->mPadding.GetRight()
-                         : stylePadding->mPadding.GetBottom();
+            const nsStyleSides& stylePadding =
+              aFrame->StylePadding()->mPadding;
+            const nsStyleCoord& paddingStart = stylePadding.GetBStart(wm);
+            const nsStyleCoord& paddingEnd = stylePadding.GetBEnd(wm);
            nscoord pad;
            if (GetAbsoluteCoord(paddingStart, pad) ||
                GetPercentBSize(paddingStart, aFrame, pad)) {
@@ -4723,10 +4723,8 @@ nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(WritingMode aWM,

  // If we're a flex item, we'll compute our size a bit differently.
  bool isVertical = aWM.IsVertical();
-  const nsStyleCoord* inlineStyleCoord =
-    isVertical ? &stylePos->mHeight : &stylePos->mWidth;
-  const nsStyleCoord* blockStyleCoord =
-    isVertical ? &stylePos->mWidth : &stylePos->mHeight;
+  const nsStyleCoord* inlineStyleCoord = &stylePos->ISize(aWM);
+  const nsStyleCoord* blockStyleCoord = &stylePos->BSize(aWM);

  bool isFlexItem = aFrame->IsFlexItem();
  bool isInlineFlexItem = false;
@@ -4819,8 +4817,7 @@ nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(WritingMode aWM,
              boxSizingToMarginEdgeISize, *inlineStyleCoord);
  }

-  const nsStyleCoord& maxISizeCoord =
-    isVertical ? stylePos->mMaxHeight : stylePos->mMaxWidth;
+  const nsStyleCoord& maxISizeCoord = stylePos->MaxISize(aWM);

  if (maxISizeCoord.GetUnit() != eStyleUnit_None &&
      !(isFlexItem && isInlineFlexItem)) {
@@ -4835,8 +4832,7 @@ nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(WritingMode aWM,
  // flex container's main-axis.  (Those properties get applied later in
  // the flexbox algorithm.)

-  const nsStyleCoord& minISizeCoord =
-    isVertical ? stylePos->mMinHeight : stylePos->mMinWidth;
+  const nsStyleCoord& minISizeCoord = stylePos->MinISize(aWM);

  if (minISizeCoord.GetUnit() != eStyleUnit_Auto &&
      !(isFlexItem && isInlineFlexItem)) {
@@ -4858,8 +4854,7 @@ nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(WritingMode aWM,
                *blockStyleCoord);
  }

-  const nsStyleCoord& maxBSizeCoord =
-    isVertical ? stylePos->mMaxWidth : stylePos->mMaxHeight;
+  const nsStyleCoord& maxBSizeCoord = stylePos->MaxBSize(aWM);

  if (!IsAutoBSize(maxBSizeCoord, aCBSize.BSize(aWM)) &&
      !(isFlexItem && !isInlineFlexItem)) {
@@ -4869,8 +4864,7 @@ nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(WritingMode aWM,
    maxBSize = nscoord_MAX;
  }

-  const nsStyleCoord& minBSizeCoord =
-    isVertical ? stylePos->mMinWidth : stylePos->mMinHeight;
+  const nsStyleCoord& minBSizeCoord = stylePos->MinBSize(aWM);

  if (!IsAutoBSize(minBSizeCoord, aCBSize.BSize(aWM)) &&
      !(isFlexItem && !isInlineFlexItem)) {
@@ -7604,71 +7598,125 @@ nsLayoutUtils::GetContentViewerSize(nsPresContext* aPresContext,
  return true;
 }

+static bool
+UpdateCompositionBoundsForRCDRSF(ParentLayerRect& aCompBounds,
+                                 nsPresContext* aPresContext,
+                                 const nsRect& aFrameBounds,
+                                 bool aScaleContentViewerSize,
+                                 const LayoutDeviceToLayerScale2D& aCumulativeResolution)
+{
+  nsIFrame* rootFrame = aPresContext->PresShell()->GetRootFrame();
+  if (!rootFrame) {
+    return false;
+  }
+
+  // On Android, we need to do things a bit differently to get things
+  // right (see bug 983208, bug 988882). We use the bounds of the nearest
+  // widget, but clamp the height to the frame bounds height. This clamping
+  // is done to get correct results for a page where the page is sized to
+  // the screen and thus the dynamic toolbar never disappears. In such a
+  // case, we want the composition bounds to exclude the toolbar height,
+  // but the widget bounds includes it. We don't currently have a good way
+  // of knowing about the toolbar height, but clamping to the frame bounds
+  // height gives the correct answer in the cases we care about.
+#ifdef MOZ_WIDGET_ANDROID
+  nsIWidget* widget = rootFrame->GetNearestWidget();
+#else
+  nsView* view = rootFrame->GetView();
+  nsIWidget* widget = view ? view->GetWidget() : nullptr;
+#endif
+
+  if (widget) {
+    nsIntRect widgetBounds;
+    widget->GetBounds(widgetBounds);
+    widgetBounds.MoveTo(0, 0);
+    aCompBounds = ParentLayerRect(ViewAs<ParentLayerPixel>(widgetBounds));
+#ifdef MOZ_WIDGET_ANDROID
+    ParentLayerRect frameBounds =
+          LayoutDeviceRect::FromAppUnits(aFrameBounds, aPresContext->AppUnitsPerDevPixel())
+        * aCumulativeResolution
+        * LayerToParentLayerScale(1.0);
+    if (frameBounds.height < aCompBounds.height) {
+      aCompBounds.height = frameBounds.height;
+    }
+#endif
+    return true;
+  }
+
+  LayoutDeviceIntSize contentSize;
+  if (nsLayoutUtils::GetContentViewerSize(aPresContext, contentSize)) {
+    LayoutDeviceToParentLayerScale scale;
+    if (aScaleContentViewerSize && aPresContext->GetParentPresContext()) {
+      scale = LayoutDeviceToParentLayerScale(
+        aPresContext->GetParentPresContext()->PresShell()->GetCumulativeResolution());
+    }
+    aCompBounds.SizeTo(contentSize * scale);
+    return true;
+  }
+
+  return false;
+}
+
+/* static */ nsMargin
+nsLayoutUtils::ScrollbarAreaToExcludeFromCompositionBoundsFor(nsIFrame* aScrollFrame)
+{
+  if (!aScrollFrame || !aScrollFrame->GetScrollTargetFrame()) {
+    return nsMargin();
+  }
+  nsPresContext* presContext = aScrollFrame->PresContext();
+  nsIPresShell* presShell = presContext->GetPresShell();
+  if (!presShell) {
+    return nsMargin();
+  }
+  bool isRootScrollFrame = aScrollFrame == presShell->GetRootScrollFrame();
+  bool isRootContentDocRootScrollFrame = isRootScrollFrame
+                                      && presContext->IsRootContentDocument();
+  if (!isRootContentDocRootScrollFrame) {
+    return nsMargin();
+  }
+  if (LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) {
+    return nsMargin();
+  }
+  nsIScrollableFrame* scrollableFrame = aScrollFrame->GetScrollTargetFrame();
+  if (!scrollableFrame) {
+    return nsMargin();
+  }
+  return scrollableFrame->GetActualScrollbarSizes();
+}
+
 /* static */ nsSize
-nsLayoutUtils::CalculateCompositionSizeForFrame(nsIFrame* aFrame)
+nsLayoutUtils::CalculateCompositionSizeForFrame(nsIFrame* aFrame, bool aSubtractScrollbars)
 {
  // If we have a scrollable frame, restrict the composition bounds to its
  // scroll port. The scroll port excludes the frame borders and the scroll
  // bars, which we don't want to be part of the composition bounds.
  nsIScrollableFrame* scrollableFrame = aFrame->GetScrollTargetFrame();
-  nsSize size = scrollableFrame ? scrollableFrame->GetScrollPortRect().Size() : aFrame->GetSize();
+  nsRect rect = scrollableFrame ? scrollableFrame->GetScrollPortRect() : aFrame->GetRect();
+  nsSize size = rect.Size();

  nsPresContext* presContext = aFrame->PresContext();
  nsIPresShell* presShell = presContext->PresShell();

-  // See the comments in the code that calculates the root
-  // composition bounds in ComputeFrameMetrics.
-  // TODO: Reuse that code here.
  bool isRootContentDocRootScrollFrame = presContext->IsRootContentDocument()
                                      && aFrame == presShell->GetRootScrollFrame();
  if (isRootContentDocRootScrollFrame) {
-    if (nsIFrame* rootFrame = presShell->GetRootFrame()) {
-#ifdef MOZ_WIDGET_ANDROID
-      nsIWidget* widget = rootFrame->GetNearestWidget();
-#else
-      nsView* view = rootFrame->GetView();
-      nsIWidget* widget = view ? view->GetWidget() : nullptr;
-#endif
+    ParentLayerRect compBounds;
+    LayoutDeviceToLayerScale2D cumulativeResolution(
+        presShell->GetCumulativeResolution()
+      * nsLayoutUtils::GetTransformToAncestorScale(aFrame));
+    if (UpdateCompositionBoundsForRCDRSF(compBounds, presContext, rect,
+        false, cumulativeResolution)) {
      int32_t auPerDevPixel = presContext->AppUnitsPerDevPixel();
-      if (widget) {
-        nsIntRect widgetBounds;
-        widget->GetBounds(widgetBounds);
-        size = nsSize(widgetBounds.width * auPerDevPixel,
-                      widgetBounds.height * auPerDevPixel);
-#ifdef MOZ_WIDGET_ANDROID
-        nsRect frameRect = aFrame->GetRect();
-        float cumulativeResolution = presShell->GetCumulativeResolution();
-        LayoutDeviceToParentLayerScale layoutToParentLayerScale =
-          // The ScreenToParentLayerScale should be mTransformScale which is
-          // not calculated yet, but we don't yet handle CSS transforms, so we
-          // assume it's 1 here.
-          LayoutDeviceToLayerScale(cumulativeResolution) *
-          LayerToScreenScale(1.0) * ScreenToParentLayerScale(1.0);
-        ParentLayerRect frameRectPixels =
-          LayoutDeviceRect::FromAppUnits(frameRect, auPerDevPixel)
-          * layoutToParentLayerScale;
-        if (frameRectPixels.height < ParentLayerRect(ViewAs<ParentLayerPixel>(widgetBounds)).height) {
-          // Our return value is in appunits of the parent, so we need to
-          // include the resolution.
-          size.height =
-            NSToCoordRound(frameRect.height * cumulativeResolution);
-        }
-#endif
-      } else {
-        LayoutDeviceIntSize contentSize;
-        if (nsLayoutUtils::GetContentViewerSize(presContext, contentSize)) {
-          size = LayoutDevicePixel::ToAppUnits(contentSize, auPerDevPixel);
-        }
-      }
-
-      if (scrollableFrame && !LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) {
-        nsMargin margins = scrollableFrame->GetActualScrollbarSizes();
-        size.width -= margins.LeftRight();
-        size.height -= margins.TopBottom();
-      }
+      size = nsSize(compBounds.width * auPerDevPixel, compBounds.height * auPerDevPixel);
    }
  }

+  if (aSubtractScrollbars) {
+    nsMargin margins = ScrollbarAreaToExcludeFromCompositionBoundsFor(aFrame);
+    size.width -= margins.LeftRight();
+    size.height -= margins.TopBottom();
+  }
+
  return size;
 }

@@ -7679,7 +7727,7 @@ nsLayoutUtils::CalculateRootCompositionSize(nsIFrame* aFrame,
 {

  if (aIsRootContentDocRootScrollFrame) {
-    return ViewAs<LayerPixel>(aMetrics.mCompositionBounds.Size(),
+    return ViewAs<LayerPixel>(aMetrics.GetCompositionBounds().Size(),
                              PixelCastJustification::ParentLayerToLayerForRootComposition)
           * LayerToScreenScale(1.0f)
           / aMetrics.DisplayportPixelsPerCSSPixel();
@@ -7693,44 +7741,22 @@ nsLayoutUtils::CalculateRootCompositionSize(nsIFrame* aFrame,
  }
  nsIPresShell* rootPresShell = nullptr;
  if (rootPresContext) {
-    // See the comments in the code that calculates the root
-    // composition bounds in RecordFrameMetrics.
-    // TODO: Reuse that code here.
-    nsIPresShell* rootPresShell = rootPresContext->PresShell();
+    rootPresShell = rootPresContext->PresShell();
    if (nsIFrame* rootFrame = rootPresShell->GetRootFrame()) {
      LayoutDeviceToLayerScale2D cumulativeResolution(
        rootPresShell->GetCumulativeResolution()
      * nsLayoutUtils::GetTransformToAncestorScale(rootFrame));
-      int32_t rootAUPerDevPixel = rootPresContext->AppUnitsPerDevPixel();
-      LayerSize frameSize =
-        (LayoutDeviceRect::FromAppUnits(rootFrame->GetRect(), rootAUPerDevPixel)
-         * cumulativeResolution).Size();
-      rootCompositionSize = frameSize * LayerToScreenScale(1.0f);
-#ifdef MOZ_WIDGET_ANDROID
-      nsIWidget* widget = rootFrame->GetNearestWidget();
-#else
-      nsView* view = rootFrame->GetView();
-      nsIWidget* widget = view ? view->GetWidget() : nullptr;
-#endif
-      if (widget) {
-        nsIntRect widgetBounds;
-        widget->GetBounds(widgetBounds);
-        rootCompositionSize = ScreenSize(ViewAs<ScreenPixel>(widgetBounds.Size()));
-#ifdef MOZ_WIDGET_ANDROID
-        if (frameSize.height < rootCompositionSize.height) {
-          rootCompositionSize.height = frameSize.height;
-        }
-#endif
+      ParentLayerRect compBounds;
+      if (UpdateCompositionBoundsForRCDRSF(compBounds, rootPresContext,
+          rootFrame->GetRect(), true, cumulativeResolution)) {
+        rootCompositionSize = ViewAs<ScreenPixel>(compBounds.Size(),
+            PixelCastJustification::ScreenIsParentLayerForRoot);
      } else {
-        LayoutDeviceIntSize contentSize;
-        if (nsLayoutUtils::GetContentViewerSize(rootPresContext, contentSize)) {
-          LayoutDeviceToLayerScale scale;
-          if (rootPresContext->GetParentPresContext()) {
-            float res = rootPresContext->GetParentPresContext()->PresShell()->GetCumulativeResolution();
-            scale = LayoutDeviceToLayerScale(res);
-          }
-          rootCompositionSize = contentSize * scale * LayerToScreenScale(1.0f);
-        }
+        int32_t rootAUPerDevPixel = rootPresContext->AppUnitsPerDevPixel();
+        LayerSize frameSize =
+          (LayoutDeviceRect::FromAppUnits(rootFrame->GetRect(), rootAUPerDevPixel)
+           * cumulativeResolution).Size();
+        rootCompositionSize = frameSize * LayerToScreenScale(1.0f);
      }
    }
  } else {
@@ -7742,16 +7768,11 @@ nsLayoutUtils::CalculateRootCompositionSize(nsIFrame* aFrame,

  // Adjust composition size for the size of scroll bars.
  nsIFrame* rootRootScrollFrame = rootPresShell ? rootPresShell->GetRootScrollFrame() : nullptr;
-  nsIScrollableFrame* rootScrollableFrame = nullptr;
-  if (rootRootScrollFrame) {
-    rootScrollableFrame = rootRootScrollFrame->GetScrollTargetFrame();
-  }
-  if (rootScrollableFrame && !LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) {
-    CSSMargin margins = CSSMargin::FromAppUnits(rootScrollableFrame->GetActualScrollbarSizes());
-    // Scrollbars are not subject to scaling, so CSS pixels = layer pixels for them.
-    rootCompositionSize.width -= margins.LeftRight();
-    rootCompositionSize.height -= margins.TopBottom();
-  }
+  nsMargin scrollbarMargins = ScrollbarAreaToExcludeFromCompositionBoundsFor(rootRootScrollFrame);
+  CSSMargin margins = CSSMargin::FromAppUnits(scrollbarMargins);
+  // Scrollbars are not subject to scaling, so CSS pixels = layer pixels for them.
+  rootCompositionSize.width -= margins.LeftRight();
+  rootCompositionSize.height -= margins.TopBottom();

  return rootCompositionSize / aMetrics.DisplayportPixelsPerCSSPixel();
 }
@@ -8143,6 +8164,7 @@ nsLayoutUtils::ComputeFrameMetrics(nsIFrame* aForFrame,
                                   Layer* aLayer,
                                   ViewID aScrollParentId,
                                   const nsRect& aViewport,
+                                   const Maybe<nsRect>& aClipRect,
                                   bool aIsRoot,
                                   const ContainerLayerParameters& aContainerParameters)
 {
@@ -8215,6 +8237,10 @@ nsLayoutUtils::ComputeFrameMetrics(nsIFrame* aForFrame,
    }
  }

+  // If we have the scrollparent being the same as the scroll id, the
+  // compositor-side code could get into an infinite loop while building the
+  // overscroll handoff chain.
+  MOZ_ASSERT(aScrollParentId == FrameMetrics::NULL_SCROLL_ID || scrollId != aScrollParentId);
  metrics.SetScrollId(scrollId);
  metrics.SetIsRoot(aIsRoot);
  metrics.SetScrollParentId(aScrollParentId);
@@ -8265,7 +8291,13 @@ nsLayoutUtils::ComputeFrameMetrics(nsIFrame* aForFrame,
  ParentLayerRect frameBounds = LayoutDeviceRect::FromAppUnits(compositionBounds, auPerDevPixel)
                              * metrics.GetCumulativeResolution()
                              * layerToParentLayerScale;
-  metrics.mCompositionBounds = frameBounds;
+
+  if (aClipRect) {
+    ParentLayerRect rect = LayoutDeviceRect::FromAppUnits(*aClipRect, auPerDevPixel)
+                         * metrics.GetCumulativeResolution()
+                         * layerToParentLayerScale;
+    metrics.SetClipRect(Some(RoundedToInt(rect)));
+  }

  // For the root scroll frame of the root content document (RCD-RSF), the above calculation
  // will yield the size of the viewport frame as the composition bounds, which
@@ -8279,56 +8311,17 @@ nsLayoutUtils::ComputeFrameMetrics(nsIFrame* aForFrame,
  bool isRootContentDocRootScrollFrame = isRootScrollFrame
                                      && presContext->IsRootContentDocument();
  if (isRootContentDocRootScrollFrame) {
-    if (nsIFrame* rootFrame = presShell->GetRootFrame()) {
-      // On Android, we need to do things a bit differently to get things
-      // right (see bug 983208, bug 988882). We use the bounds of the nearest
-      // widget, but clamp the height to the frame bounds height. This clamping
-      // is done to get correct results for a page where the page is sized to
-      // the screen and thus the dynamic toolbar never disappears. In such a
-      // case, we want the composition bounds to exclude the toolbar height,
-      // but the widget bounds includes it. We don't currently have a good way
-      // of knowing about the toolbar height, but clamping to the frame bounds
-      // height gives the correct answer in the cases we care about.
-#ifdef MOZ_WIDGET_ANDROID
-      nsIWidget* widget = rootFrame->GetNearestWidget();
-#else
-      nsView* view = rootFrame->GetView();
-      nsIWidget* widget = view ? view->GetWidget() : nullptr;
-#endif
-      if (widget) {
-        nsIntRect widgetBounds;
-        widget->GetBounds(widgetBounds);
-        widgetBounds.MoveTo(0,0);
-        metrics.mCompositionBounds = ParentLayerRect(ViewAs<ParentLayerPixel>(widgetBounds));
-#ifdef MOZ_WIDGET_ANDROID
-        if (frameBounds.height < metrics.mCompositionBounds.height) {
-          metrics.mCompositionBounds.height = frameBounds.height;
-        }
-#endif
-      } else {
-        LayoutDeviceIntSize contentSize;
-        if (nsLayoutUtils::GetContentViewerSize(presContext, contentSize)) {
-          LayoutDeviceToParentLayerScale scale;
-          if (presContext->GetParentPresContext()) {
-            float res = presContext->GetParentPresContext()->PresShell()->GetCumulativeResolution();
-            scale = LayoutDeviceToParentLayerScale(res);
-          }
-          metrics.mCompositionBounds.SizeTo(contentSize * scale);
-        }
-      }
-
-      // Exclude any non-overlay scroll bars from the composition bounds.
-      // This is only done for the RCD-RSF case, because otherwise the scroll
-      // port size is used and that already excludes the scroll bars.
-      if (scrollableFrame && !LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) {
-        nsMargin sizes = scrollableFrame->GetActualScrollbarSizes();
-        // Scrollbars are not subject to scaling, so CSS pixels = layer pixels for them.
-        ParentLayerMargin boundMargins = CSSMargin::FromAppUnits(sizes) * CSSToParentLayerScale(1.0f);
-        metrics.mCompositionBounds.Deflate(boundMargins);
-      }
-    }
+    UpdateCompositionBoundsForRCDRSF(frameBounds, presContext,
+      compositionBounds, true, metrics.GetCumulativeResolution());
  }

+  nsMargin sizes = ScrollbarAreaToExcludeFromCompositionBoundsFor(aScrollFrame);
+  // Scrollbars are not subject to scaling, so CSS pixels = layer pixels for them.
+  ParentLayerMargin boundMargins = CSSMargin::FromAppUnits(sizes) * CSSToParentLayerScale(1.0f);
+  frameBounds.Deflate(boundMargins);
+
+  metrics.SetCompositionBounds(frameBounds);
+
  metrics.SetRootCompositionSize(
    nsLayoutUtils::CalculateRootCompositionSize(aScrollFrame ? aScrollFrame : aForFrame,
                                                isRootContentDocRootScrollFrame, metrics));
@@ -8,6 +8,7 @@

 #include "mozilla/MemoryReporting.h"
 #include "mozilla/ArrayUtils.h"
+#include "mozilla/Maybe.h"
 #include "nsBoundingMetrics.h"
 #include "nsChangeHint.h"
 #include "nsAutoPtr.h"
@@ -2168,13 +2169,18 @@ public:

  /**
   * Find a suitable scale for an element (aContent) over the course of any
-   * animations and transitions on the element.
+   * animations and transitions of the CSS transform property on the
+   * element that run on the compositor thread.
   * It will check the maximum and minimum scale during the animations and
   * transitions and return a suitable value for performance and quality.
-   * Will return scale(1,1) if there is no animated scaling.
-   * Always return positive value.
+   * Will return scale(1,1) if there are no such animations.
+   * Always returns a positive value.
+   * @param aVisibleSize is the size of the area we want to paint
+   * @param aDisplaySize is the size of the display area of the pres context
   */
-  static gfxSize ComputeSuitableScaleForAnimation(nsIContent* aContent);
+  static gfxSize ComputeSuitableScaleForAnimation(nsIContent* aContent,
+                                                  const nsSize& aVisibleSize,
+                                                  const nsSize& aDisplaySize);

  /**
   * Checks if we should forcibly use nearest pixel filtering for the
@@ -2486,7 +2492,7 @@ public:
  * are likely to need special-case handling of the RCD-RSF.
  */
  static nsSize
-  CalculateCompositionSizeForFrame(nsIFrame* aFrame);
+  CalculateCompositionSizeForFrame(nsIFrame* aFrame, bool aSubtractScrollbars = true);

 /**
  * Calculate the composition size for the root scroll frame of the root
@@ -2635,9 +2641,23 @@ public:
                                          Layer* aLayer,
                                          ViewID aScrollParentId,
                                          const nsRect& aViewport,
+                                          const mozilla::Maybe<nsRect>& aClipRect,
                                          bool aIsRoot,
                                          const ContainerLayerParameters& aContainerParameters);

+  /**
+   * If the given scroll frame needs an area excluded from its composition
+   * bounds due to scrollbars, return that area, otherwise return an empty
+   * margin.
+   * There is no need to exclude scrollbars in the following cases:
+   *   - If the scroll frame is not the RCD-RSF; in that case, the composition
+   *     bounds is calculated based on the scroll port which already excludes
+   *     the scrollbar area.
+   *   - If the scrollbars are overlay, since then they are drawn on top of the
+   *     scrollable content.
+   */
+  static nsMargin ScrollbarAreaToExcludeFromCompositionBoundsFor(nsIFrame* aScrollFrame);
+
 private:
  static uint32_t sFontSizeInflationEmPerLine;
  static uint32_t sFontSizeInflationMinTwips;
@@ -135,6 +135,7 @@ using namespace mozilla::system;
 #include "CameraPreferences.h"
 #include "TouchManager.h"
 #include "MediaDecoder.h"
+#include "mozilla/layers/CompositorLRU.h"

 using namespace mozilla;
 using namespace mozilla::net;
@@ -311,6 +312,8 @@ nsLayoutStatics::Initialize()

  PromiseDebugging::Init();

+  layers::CompositorLRU::Init();
+
  return NS_OK;
 }

@@ -36,22 +36,6 @@ enum PhysicalAxis {
  eAxisHorizontal    = 0x1
 };

-// Logical axis, edge and side constants for use in various places.
-enum LogicalAxis {
-  eLogicalAxisBlock  = 0x0,
-  eLogicalAxisInline = 0x1
-};
-enum LogicalEdge {
-  eLogicalEdgeStart  = 0x0,
-  eLogicalEdgeEnd    = 0x1
-};
-enum LogicalSide {
-  eLogicalSideBStart = (eLogicalAxisBlock  << 1) | eLogicalEdgeStart,  // 0x0
-  eLogicalSideBEnd   = (eLogicalAxisBlock  << 1) | eLogicalEdgeEnd,    // 0x1
-  eLogicalSideIStart = (eLogicalAxisInline << 1) | eLogicalEdgeStart,  // 0x2
-  eLogicalSideIEnd   = (eLogicalAxisInline << 1) | eLogicalEdgeEnd     // 0x3
-};
-
 inline bool IsInline(LogicalSide aSide) { return aSide & 0x2; }
 inline bool IsBlock(LogicalSide aSide) { return !IsInline(aSide); }
 inline bool IsEnd(LogicalSide aSide) { return aSide & 0x1; }
@@ -1802,4 +1786,153 @@ private:

 } // namespace mozilla

+// Definitions of inline methods for nsStyleSides, declared in nsStyleCoord.h
+// but not defined there because they need WritingMode.
+inline nsStyleUnit nsStyleSides::GetUnit(mozilla::WritingMode aWM,
+                                         mozilla::LogicalSide aSide) const
+{
+  return GetUnit(aWM.PhysicalSide(aSide));
+}
+
+inline nsStyleUnit nsStyleSides::GetIStartUnit(mozilla::WritingMode aWM) const
+{
+  return GetUnit(aWM, mozilla::eLogicalSideIStart);
+}
+
+inline nsStyleUnit nsStyleSides::GetBStartUnit(mozilla::WritingMode aWM) const
+{
+  return GetUnit(aWM, mozilla::eLogicalSideBStart);
+}
+
+inline nsStyleUnit nsStyleSides::GetIEndUnit(mozilla::WritingMode aWM) const
+{
+  return GetUnit(aWM, mozilla::eLogicalSideIEnd);
+}
+
+inline nsStyleUnit nsStyleSides::GetBEndUnit(mozilla::WritingMode aWM) const
+{
+  return GetUnit(aWM, mozilla::eLogicalSideBEnd);
+}
+
+inline nsStyleCoord nsStyleSides::Get(mozilla::WritingMode aWM,
+                                      mozilla::LogicalSide aSide) const
+{
+  return Get(aWM.PhysicalSide(aSide));
+}
+
+inline nsStyleCoord nsStyleSides::GetIStart(mozilla::WritingMode aWM) const
+{
+  return Get(aWM, mozilla::eLogicalSideIStart);
+}
+
+inline nsStyleCoord nsStyleSides::GetBStart(mozilla::WritingMode aWM) const
+{
+  return Get(aWM, mozilla::eLogicalSideBStart);
+}
+
+inline nsStyleCoord nsStyleSides::GetIEnd(mozilla::WritingMode aWM) const
+{
+  return Get(aWM, mozilla::eLogicalSideIEnd);
+}
+
+inline nsStyleCoord nsStyleSides::GetBEnd(mozilla::WritingMode aWM) const
+{
+  return Get(aWM, mozilla::eLogicalSideBEnd);
+}
+
+// Definitions of inline methods for nsStylePosition, declared in
+// nsStyleStruct.h but not defined there because they need WritingMode.
+inline nsStyleCoord& nsStylePosition::ISize(mozilla::WritingMode aWM)
+{
+  return aWM.IsVertical() ? mHeight : mWidth;
+}
+inline nsStyleCoord& nsStylePosition::MinISize(mozilla::WritingMode aWM)
+{
+  return aWM.IsVertical() ? mMinHeight : mMinWidth;
+}
+inline nsStyleCoord& nsStylePosition::MaxISize(mozilla::WritingMode aWM)
+{
+  return aWM.IsVertical() ? mMaxHeight : mMaxWidth;
+}
+inline nsStyleCoord& nsStylePosition::BSize(mozilla::WritingMode aWM)
+{
+  return aWM.IsVertical() ? mWidth : mHeight;
+}
+inline nsStyleCoord& nsStylePosition::MinBSize(mozilla::WritingMode aWM)
+{
+  return aWM.IsVertical() ? mMinWidth : mMinHeight;
+}
+inline nsStyleCoord& nsStylePosition::MaxBSize(mozilla::WritingMode aWM)
+{
+  return aWM.IsVertical() ? mMaxWidth : mMaxHeight;
+}
+
+inline const nsStyleCoord&
+nsStylePosition::ISize(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? mHeight : mWidth;
+}
+inline const nsStyleCoord&
+nsStylePosition::MinISize(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? mMinHeight : mMinWidth;
+}
+inline const nsStyleCoord&
+nsStylePosition::MaxISize(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? mMaxHeight : mMaxWidth;
+}
+inline const nsStyleCoord&
+nsStylePosition::BSize(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? mWidth : mHeight;
+}
+inline const nsStyleCoord&
+nsStylePosition::MinBSize(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? mMinWidth : mMinHeight;
+}
+inline const nsStyleCoord&
+nsStylePosition::MaxBSize(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? mMaxWidth : mMaxHeight;
+}
+
+inline bool
+nsStylePosition::ISizeDependsOnContainer(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? HeightDependsOnContainer()
+                          : WidthDependsOnContainer();
+}
+inline bool
+nsStylePosition::MinISizeDependsOnContainer(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? MinHeightDependsOnContainer()
+                          : MinWidthDependsOnContainer();
+}
+inline bool
+nsStylePosition::MaxISizeDependsOnContainer(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? MaxHeightDependsOnContainer()
+                          : MaxWidthDependsOnContainer();
+}
+inline bool
+nsStylePosition::BSizeDependsOnContainer(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? WidthDependsOnContainer()
+                          : HeightDependsOnContainer();
+}
+inline bool
+nsStylePosition::MinBSizeDependsOnContainer(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? MinWidthDependsOnContainer()
+                          : MinHeightDependsOnContainer();
+}
+inline bool
+nsStylePosition::MaxBSizeDependsOnContainer(mozilla::WritingMode aWM) const
+{
+  return aWM.IsVertical() ? MaxWidthDependsOnContainer()
+                          : MaxHeightDependsOnContainer();
+}
+
 #endif // WritingModes_h_
@@ -2999,38 +2999,22 @@ nsBlockFrame::IsSelfEmpty()
    return false;
  }

+  WritingMode wm = GetWritingMode();
  const nsStylePosition* position = StylePosition();
-  bool vertical = GetWritingMode().IsVertical();

-  if (vertical) {
-    if (IsNonAutoNonZeroBSize(position->mMinWidth) ||
-        IsNonAutoNonZeroBSize(position->mWidth)) {
-      return false;
-    }
-  } else {
-    if (IsNonAutoNonZeroBSize(position->mMinHeight) ||
-        IsNonAutoNonZeroBSize(position->mHeight)) {
-      return false;
-    }
+  if (IsNonAutoNonZeroBSize(position->MinBSize(wm)) ||
+      IsNonAutoNonZeroBSize(position->BSize(wm))) {
+    return false;
  }

  const nsStyleBorder* border = StyleBorder();
  const nsStylePadding* padding = StylePadding();

-  if (vertical) {
-    if (border->GetComputedBorderWidth(NS_SIDE_LEFT) != 0 ||
-        border->GetComputedBorderWidth(NS_SIDE_RIGHT) != 0 ||
-        !nsLayoutUtils::IsPaddingZero(padding->mPadding.GetLeft()) ||
-        !nsLayoutUtils::IsPaddingZero(padding->mPadding.GetRight())) {
-      return false;
-    }
-  } else {
-    if (border->GetComputedBorderWidth(NS_SIDE_TOP) != 0 ||
-        border->GetComputedBorderWidth(NS_SIDE_BOTTOM) != 0 ||
-        !nsLayoutUtils::IsPaddingZero(padding->mPadding.GetTop()) ||
-        !nsLayoutUtils::IsPaddingZero(padding->mPadding.GetBottom())) {
-      return false;
-    }
+  if (border->GetComputedBorderWidth(wm.PhysicalSide(eLogicalSideBStart)) != 0 ||
+      border->GetComputedBorderWidth(wm.PhysicalSide(eLogicalSideBEnd)) != 0 ||
+      !nsLayoutUtils::IsPaddingZero(padding->mPadding.GetBStart(wm)) ||
+      !nsLayoutUtils::IsPaddingZero(padding->mPadding.GetBEnd(wm))) {
+    return false;
  }

  if (HasOutsideBullet() && !BulletIsEmpty()) {
@@ -899,9 +899,7 @@ nsContainerFrame::ComputeAutoSize(nsRenderingContext* aRenderingContext,
  // replaced elements always shrink-wrap
  if (aShrinkWrap || IsFrameOfType(eReplaced)) {
    // don't bother setting it if the result won't be used
-    const nsStyleCoord& inlineStyleCoord =
-      aWM.IsVertical() ? StylePosition()->mHeight : StylePosition()->mWidth;
-    if (inlineStyleCoord.GetUnit() == eStyleUnit_Auto) {
+    if (StylePosition()->ISize(aWM).GetUnit() == eStyleUnit_Auto) {
      result.ISize(aWM) = ShrinkWidthToFit(aRenderingContext, availBased);
    }
  } else {
@@ -4207,12 +4207,8 @@ nsFrame::ComputeSize(nsRenderingContext *aRenderingContext,
    aMargin.ISize(aWM) + aBorder.ISize(aWM) + aPadding.ISize(aWM) -
    boxSizingAdjust.ISize(aWM);

-  bool isVertical = aWM.IsVertical();
-
-  const nsStyleCoord* inlineStyleCoord =
-    isVertical ? &(stylePos->mHeight) : &(stylePos->mWidth);
-  const nsStyleCoord* blockStyleCoord =
-    isVertical ? &(stylePos->mWidth) : &(stylePos->mHeight);
+  const nsStyleCoord* inlineStyleCoord = &stylePos->ISize(aWM);
+  const nsStyleCoord* blockStyleCoord = &stylePos->BSize(aWM);

  bool isFlexItem = IsFlexItem();
  bool isInlineFlexItem = false;
@@ -4258,8 +4254,7 @@ nsFrame::ComputeSize(nsRenderingContext *aRenderingContext,
        *inlineStyleCoord);
  }

-  const nsStyleCoord& maxISizeCoord =
-    isVertical ? stylePos->mMaxHeight : stylePos->mMaxWidth;
+  const nsStyleCoord& maxISizeCoord = stylePos->MaxISize(aWM);

  // Flex items ignore their min & max sizing properties in their
  // flex container's main-axis.  (Those properties get applied later in
@@ -4273,8 +4268,7 @@ nsFrame::ComputeSize(nsRenderingContext *aRenderingContext,
    result.ISize(aWM) = std::min(maxISize, result.ISize(aWM));
  }

-  const nsStyleCoord& minISizeCoord =
-    isVertical ? stylePos->mMinHeight : stylePos->mMinWidth;
+  const nsStyleCoord& minISizeCoord = stylePos->MinISize(aWM);

  nscoord minISize;
  if (minISizeCoord.GetUnit() != eStyleUnit_Auto &&
@@ -4305,8 +4299,7 @@ nsFrame::ComputeSize(nsRenderingContext *aRenderingContext,
                                       *blockStyleCoord);
  }

-  const nsStyleCoord& maxBSizeCoord =
-    isVertical ? stylePos->mMaxWidth : stylePos->mMaxHeight;
+  const nsStyleCoord& maxBSizeCoord = stylePos->MaxBSize(aWM);

  if (result.BSize(aWM) != NS_UNCONSTRAINEDSIZE) {
    if (!nsLayoutUtils::IsAutoBSize(maxBSizeCoord, aCBSize.BSize(aWM)) &&
@@ -4318,8 +4311,7 @@ nsFrame::ComputeSize(nsRenderingContext *aRenderingContext,
      result.BSize(aWM) = std::min(maxBSize, result.BSize(aWM));
    }

-    const nsStyleCoord& minBSizeCoord =
-      isVertical ? stylePos->mMinWidth : stylePos->mMinHeight;
+    const nsStyleCoord& minBSizeCoord = stylePos->MinBSize(aWM);

    if (!nsLayoutUtils::IsAutoBSize(minBSizeCoord, aCBSize.BSize(aWM)) &&
        !(isFlexItem && !isInlineFlexItem)) {
@@ -4415,9 +4407,7 @@ nsFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
  LogicalSize result(aWM, 0xdeadbeef, NS_UNCONSTRAINEDSIZE);

  // don't bother setting it if the result won't be used
-  const nsStyleCoord& inlineStyleCoord =
-    aWM.IsVertical() ? StylePosition()->mHeight : StylePosition()->mWidth;
-  if (inlineStyleCoord.GetUnit() == eStyleUnit_Auto) {
+  if (StylePosition()->ISize(aWM).GetUnit() == eStyleUnit_Auto) {
    nscoord availBased = aAvailableISize - aMargin.ISize(aWM) -
                         aBorder.ISize(aWM) - aPadding.ISize(aWM);
    result.ISize(aWM) = ShrinkWidthToFit(aRenderingContext, availBased);
@@ -55,6 +55,7 @@
 #include "gfxPlatform.h"
 #include "gfxPrefs.h"
 #include "AsyncScrollBase.h"
+#include "UnitTransforms.h"
 #include <mozilla/layers/AxisPhysicsModel.h>
 #include <mozilla/layers/AxisPhysicsMSDModel.h>
 #include <algorithm>
@@ -351,10 +352,16 @@ nsHTMLScrollFrame::TryLayout(ScrollReflowState* aState,
    ComputeInsideBorderSize(aState, desiredInsideBorderSize);
  nsSize scrollPortSize = nsSize(std::max(0, aState->mInsideBorderSize.width - vScrollbarDesiredWidth),
                                 std::max(0, aState->mInsideBorderSize.height - hScrollbarDesiredHeight));
+
  nsSize visualScrollPortSize = scrollPortSize;
  nsIPresShell* presShell = PresContext()->PresShell();
  if (mHelper.mIsRoot && presShell->IsScrollPositionClampingScrollPortSizeSet()) {
-    visualScrollPortSize = presShell->GetScrollPositionClampingScrollPortSize();
+    nsSize compositionSize = nsLayoutUtils::CalculateCompositionSizeForFrame(this, false);
+    float resolution = presShell->GetResolution();
+    compositionSize.width /= resolution;
+    compositionSize.height /= resolution;
+    visualScrollPortSize = nsSize(std::max(0, compositionSize.width - vScrollbarDesiredWidth),
+                                  std::max(0, compositionSize.height - hScrollbarDesiredHeight));
  }

  if (!aForce) {
@@ -394,7 +401,7 @@ nsHTMLScrollFrame::TryLayout(ScrollReflowState* aState,
  aState->mShowVScrollbar = aAssumeVScroll;
  nsPoint scrollPortOrigin(aState->mComputedBorder.left,
                           aState->mComputedBorder.top);
-  if (!mHelper.IsScrollbarOnRight()) {
+  if (!IsScrollbarOnRight()) {
    scrollPortOrigin.x += vScrollbarActualWidth;
  }
  mHelper.mScrollPort = nsRect(scrollPortOrigin, scrollPortSize);
@@ -3036,17 +3043,30 @@ void
 ScrollFrameHelper::ComputeFrameMetrics(Layer* aLayer,
                                       nsIFrame* aContainerReferenceFrame,
                                       const ContainerLayerParameters& aParameters,
-                                       Maybe<nsRect>* aClipRect,
                                       nsTArray<FrameMetrics>* aOutput) const
 {
+  if (!mShouldBuildScrollableLayer || mIsScrollableLayerInRootContainer) {
+    return;
+  }
+
+  bool needsParentLayerClip = true;
+  if (gfxPrefs::LayoutUseContainersForRootFrames() && !mAddClipRectToLayer) {
+    // For containerful frames, the clip is on the container frame.
+    needsParentLayerClip = false;
+  }
+
+  // Note: Do not apply clips to the scroll ports of metrics above the first
+  // one on a given layer. They will be applied by the compositor instead,
+  // with async transforms for the scrollframes interspersed between them.
+  if (aOutput->Length() > 0) {
+    needsParentLayerClip = false;
+  }
+
  nsPoint toReferenceFrame = mOuter->GetOffsetToCrossDoc(aContainerReferenceFrame);
  bool isRoot = mIsRoot && mOuter->PresContext()->IsRootContentDocument();
-  // If APZ is enabled, do not apply clips to the scroll ports of metrics
-  // above the first one on a given layer. They will be applied by the
-  // compositor instead, with async transforms for the scrollframes interspersed
-  // between them.
-  bool omitClip = gfxPrefs::AsyncPanZoomEnabled() && aOutput->Length() > 0;
-  if (!omitClip && (!gfxPrefs::LayoutUseContainersForRootFrames() || mAddClipRectToLayer)) {
+
+  Maybe<nsRect> parentLayerClip;
+  if (needsParentLayerClip) {
    nsRect clip = nsRect(mScrollPort.TopLeft() + toReferenceFrame,
                         nsLayoutUtils::CalculateCompositionSizeForFrame(mOuter));
    if (isRoot) {
@@ -3054,12 +3074,31 @@ ScrollFrameHelper::ComputeFrameMetrics(Layer* aLayer,
      clip.width = NSToCoordRound(clip.width / res);
      clip.height = NSToCoordRound(clip.height / res);
    }
-    // When using containers, the container layer contains the clip. Otherwise
-    // we always include the clip.
-    *aClipRect = Some(clip);
+
+    parentLayerClip = Some(clip);
  }

-  if (!mShouldBuildScrollableLayer || mIsScrollableLayerInRootContainer) {
+  if (!gfxPrefs::AsyncPanZoomEnabled()) {
+    if (parentLayerClip) {
+      // If APZ is not enabled, we still need the displayport to be clipped
+      // in the compositor.
+      ParentLayerIntRect displayportClip =
+        ViewAs<ParentLayerPixel>(
+          parentLayerClip->ScaleToNearestPixels(
+            aParameters.mXScale,
+            aParameters.mYScale,
+            mScrolledFrame->PresContext()->AppUnitsPerDevPixel()));
+
+      ParentLayerIntRect layerClip;
+      if (const ParentLayerIntRect* origClip = aLayer->GetClipRect().ptrOr(nullptr)) {
+        layerClip = displayportClip.Intersect(*origClip);
+      } else {
+        layerClip = displayportClip;
+      }
+      aLayer->SetClipRect(Some(layerClip));
+    }
+
+    // Return early, since if we don't use APZ we don't need FrameMetrics.
    return;
  }

@@ -3070,7 +3109,7 @@ ScrollFrameHelper::ComputeFrameMetrics(Layer* aLayer,
      nsLayoutUtils::ComputeFrameMetrics(
        mScrolledFrame, mOuter, mOuter->GetContent(),
        aContainerReferenceFrame, aLayer, mScrollParentID,
-        scrollport, isRoot, aParameters);
+        scrollport, parentLayerClip, isRoot, aParameters);
 }

 bool
@@ -4269,7 +4308,7 @@ ScrollFrameHelper::IsScrollingActive(nsDisplayListBuilder* aBuilder) const
 nsresult
 nsXULScrollFrame::Layout(nsBoxLayoutState& aState)
 {
-  bool scrollbarRight = mHelper.IsScrollbarOnRight();
+  bool scrollbarRight = IsScrollbarOnRight();
  bool scrollbarBottom = true;

  // get the content rect
@@ -4888,12 +4927,12 @@ ScrollFrameHelper::SetCoordAttribute(nsIContent* aContent, nsIAtom* aAtom,
  DebugOnly<nsWeakPtr> weakShell(
    do_GetWeakReference(mOuter->PresContext()->PresShell()));
  // convert to pixels
-  aSize = nsPresContext::AppUnitsToIntCSSPixels(aSize);
+  int32_t pixelSize = nsPresContext::AppUnitsToIntCSSPixels(aSize);

  // only set the attribute if it changed.

  nsAutoString newValue;
-  newValue.AppendInt(aSize);
+  newValue.AppendInt(pixelSize);

  if (aContent->AttrValueIs(kNameSpaceID_None, aAtom, newValue, eCaseMatters))
    return;
@@ -378,7 +378,6 @@ public:
  bool WantAsyncScroll() const;
  void ComputeFrameMetrics(Layer* aLayer, nsIFrame* aContainerReferenceFrame,
                           const ContainerLayerParameters& aParameters,
-                           mozilla::Maybe<nsRect>* aClipRect,
                           nsTArray<FrameMetrics>* aOutput) const;

  // nsIScrollbarMediator
@@ -833,10 +832,9 @@ public:
  }
  virtual void ComputeFrameMetrics(Layer* aLayer, nsIFrame* aContainerReferenceFrame,
                                   const ContainerLayerParameters& aParameters,
-                                   mozilla::Maybe<nsRect>* aClipRect,
                                   nsTArray<FrameMetrics>* aOutput) const override {
    mHelper.ComputeFrameMetrics(aLayer, aContainerReferenceFrame,
-                                aParameters, aClipRect, aOutput);
+                                aParameters, aOutput);
  }
  virtual bool IsIgnoringViewportClipping() const override {
    return mHelper.IsIgnoringViewportClipping();
@@ -898,6 +896,10 @@ public:
  virtual void ScrollbarActivityStarted() const override;
  virtual void ScrollbarActivityStopped() const override;

+  virtual bool IsScrollbarOnRight() const override {
+    return mHelper.IsScrollbarOnRight();
+  }
+
  virtual void SetTransformingByAPZ(bool aTransforming) override {
    mHelper.SetTransformingByAPZ(aTransforming);
  }
@@ -1222,10 +1224,9 @@ public:
  }
  virtual void ComputeFrameMetrics(Layer* aLayer, nsIFrame* aContainerReferenceFrame,
                                   const ContainerLayerParameters& aParameters,
-                                   mozilla::Maybe<nsRect>* aClipRect,
                                   nsTArray<FrameMetrics>* aOutput) const override {
    mHelper.ComputeFrameMetrics(aLayer, aContainerReferenceFrame,
-                                aParameters, aClipRect, aOutput);
+                                aParameters, aOutput);
  }
  virtual bool IsIgnoringViewportClipping() const override {
    return mHelper.IsIgnoringViewportClipping();
@@ -1295,6 +1296,10 @@ public:
  virtual void ScrollbarActivityStarted() const override;
  virtual void ScrollbarActivityStopped() const override;

+  virtual bool IsScrollbarOnRight() const override {
+    return mHelper.IsScrollbarOnRight();
+  }
+
  virtual void SetTransformingByAPZ(bool aTransforming) override {
    mHelper.SetTransformingByAPZ(aTransforming);
  }
@@ -386,11 +386,8 @@ nsHTMLReflowState::Init(nsPresContext* aPresContext,
    // An SVG foreignObject frame is inherently constrained block-size.
    frame->AddStateBits(NS_FRAME_IN_CONSTRAINED_BSIZE);
  } else {
-    const bool vertical = mWritingMode.IsVertical();
-    const nsStyleCoord& bSizeCoord =
-      vertical ? mStylePosition->mWidth : mStylePosition->mHeight;
-    const nsStyleCoord& maxBSizeCoord =
-      vertical ? mStylePosition->mMaxWidth : mStylePosition->mMaxHeight;
+    const nsStyleCoord& bSizeCoord = mStylePosition->BSize(mWritingMode);
+    const nsStyleCoord& maxBSizeCoord = mStylePosition->MaxBSize(mWritingMode);
    if ((bSizeCoord.GetUnit() != eStyleUnit_Auto ||
         maxBSizeCoord.GetUnit() != eStyleUnit_None) &&
         // Don't set NS_FRAME_IN_CONSTRAINED_BSIZE on body or html elements.
@@ -404,10 +401,8 @@ nsHTMLReflowState::Init(nsPresContext* aPresContext,
      nsIFrame* containingBlk = frame;
      while (containingBlk) {
        const nsStylePosition* stylePos = containingBlk->StylePosition();
-        const nsStyleCoord& bSizeCoord =
-          vertical ? stylePos->mWidth : stylePos->mHeight;
-        const nsStyleCoord& maxBSizeCoord =
-          vertical ? stylePos->mMaxWidth : stylePos->mMaxHeight;
+        const nsStyleCoord& bSizeCoord = stylePos->BSize(mWritingMode);
+        const nsStyleCoord& maxBSizeCoord = stylePos->MaxBSize(mWritingMode);
        if ((bSizeCoord.IsCoordPercentCalcUnit() &&
             !bSizeCoord.HasPercent()) ||
            (maxBSizeCoord.IsCoordPercentCalcUnit() &&
@@ -2422,25 +2417,9 @@ nsHTMLReflowState::CalculateBlockSideMargins(nsIAtom* aFrameType)

  // The css2 spec clearly defines how block elements should behave
  // in section 10.3.3.
-  bool isAutoStartMargin, isAutoEndMargin;
  const nsStyleSides& styleSides = mStyleMargin->mMargin;
-  if (cbWM.IsVertical()) {
-    if (cbWM.IsBidiLTR()) {
-      isAutoStartMargin = eStyleUnit_Auto == styleSides.GetTopUnit();
-      isAutoEndMargin = eStyleUnit_Auto == styleSides.GetBottomUnit();
-    } else {
-      isAutoStartMargin = eStyleUnit_Auto == styleSides.GetBottomUnit();
-      isAutoEndMargin = eStyleUnit_Auto == styleSides.GetTopUnit();
-    }
-  } else {
-    if (cbWM.IsBidiLTR()) {
-      isAutoStartMargin = eStyleUnit_Auto == styleSides.GetLeftUnit();
-      isAutoEndMargin = eStyleUnit_Auto == styleSides.GetRightUnit();
-    } else {
-      isAutoStartMargin = eStyleUnit_Auto == styleSides.GetRightUnit();
-      isAutoEndMargin = eStyleUnit_Auto == styleSides.GetLeftUnit();
-    }
-  }
+  bool isAutoStartMargin = eStyleUnit_Auto == styleSides.GetIStartUnit(cbWM);
+  bool isAutoEndMargin = eStyleUnit_Auto == styleSides.GetIEndUnit(cbWM);
  if (!isAutoStartMargin && !isAutoEndMargin) {
    // Neither margin is 'auto' so we're over constrained. Use the
    // 'direction' property of the parent to tell which margin to
@@ -418,7 +418,6 @@ public:
  virtual void ComputeFrameMetrics(mozilla::layers::Layer* aLayer,
                                   nsIFrame* aContainerReferenceFrame,
                                   const ContainerLayerParameters& aParameters,
-                                   mozilla::Maybe<nsRect>* aOutClipRect,
                                   nsTArray<FrameMetrics>* aOutput) const = 0;

  /**
@@ -9,7 +9,7 @@ fuzzy-if(/^Windows\x20NT\x206\.1/.test(http.oscpu)&&!layersGPUAccelerated&&!azur
 == table-caption-2.html table-internal-2-ref.html
 == table-caption-3.html table-internal-3-ref.html
 == table-caption-4.html table-internal-8-ref.html
-skip-if(B2G&&browserIsRemote) != table-caption-5.html table-print-1-ref.html # TODO: change to == when bug 967870 is fixed
+skip-if((B2G&&browserIsRemote)||Mulet) != table-caption-5.html table-print-1-ref.html # TODO: change to == when bug 967870 is fixed # Initial mulet triage: parity with B2G/B2G Desktop
 == table-cell-1.html table-internal-1-ref.html
 == table-cell-2.html table-internal-2-ref.html
 == table-cell-3.html table-internal-3-ref.html
@@ -17,7 +17,7 @@ skip-if(B2G&&browserIsRemote) != table-caption-5.html table-print-1-ref.html # T
 == table-cell-5.html table-internal-5-ref.html
 == table-cell-6.html table-internal-6-ref.html
 == table-cell-7.html table-internal-7-ref.html
-skip-if(B2G&&browserIsRemote) != table-cell-8.html table-print-1-ref.html # TODO: change to == when bug 967870 is fixed
+skip-if((B2G&&browserIsRemote)||Mulet) != table-cell-8.html table-print-1-ref.html # TODO: change to == when bug 967870 is fixed # Initial mulet triage: parity with B2G/B2G Desktop
 == table-row-1.html table-internal-1-ref.html
 == table-row-2.html table-internal-2-ref.html
 == table-row-3.html table-internal-3-ref.html
@@ -49,7 +49,7 @@ skip-if(B2G&&browserIsRemote) != table-cell-8.html table-print-1-ref.html # TODO
 == continuation-positioned-inline-1.html continuation-positioned-inline-ref.html
 == continuation-positioned-inline-2.html continuation-positioned-inline-ref.html
 == scrollframe-1.html scrollframe-1-ref.html
-skip-if(B2G) fuzzy-if(Android,9,185) == scrollframe-2.html scrollframe-2-ref.html #bug 756530
+skip-if(B2G||Mulet) fuzzy-if(Android,9,185) == scrollframe-2.html scrollframe-2-ref.html #bug 756530 # Initial mulet triage: parity with B2G/B2G Desktop
 fuzzy-if(gtk2Widget,1,8) == select-1.html select-1-ref.html
 fuzzy-if(gtk2Widget,1,8) == select-1-dynamic.html select-1-ref.html
 == select-2.html select-2-ref.html
@@ -1,8 +1,8 @@
 include gradient/reftest.list
 include vector/reftest.list

-skip-if(B2G) == layers-stacking-order.xhtml layers-stacking-order-ref.xhtml
-skip-if(B2G) == layers-layer-count-cascade-1.xhtml layers-layer-count-1-ref.xhtml
+skip-if(B2G||Mulet) == layers-stacking-order.xhtml layers-stacking-order-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == layers-layer-count-cascade-1.xhtml layers-layer-count-1-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
 == layers-layer-count-inheritance-1.xhtml layers-layer-count-1-ref.xhtml
 == layers-layer-count-cascade-2.xhtml layers-layer-count-2-ref.xhtml
 == layers-layer-count-inheritance-2.xhtml layers-layer-count-2-ref.xhtml
@@ -15,7 +15,7 @@ fuzzy-if(Android,9,600000) == viewport-translucent-color-1.html viewport-translu
 == translucent-color-2.html translucent-color-ref.html
 == translucent-color-3.html translucent-color-ref.html
 != translucent-color-ref.html about:blank
-skip-if(B2G) == root-element-display-none-1.html root-element-display-none-ref.html
+skip-if(B2G||Mulet) == root-element-display-none-1.html root-element-display-none-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == continuous-inline-1a.html continuous-inline-1ab-ref.html
 == continuous-inline-1b.html continuous-inline-1ab-ref.html
 == continuous-inline-1c.html continuous-inline-1cd-ref.html
@@ -23,8 +23,8 @@ skip-if(B2G) == root-element-display-none-1.html root-element-display-none-ref.h
 == continuous-inline-2a.html continuous-inline-2-ref.html
 == continuous-inline-2b.html continuous-inline-2-ref.html
 == continuous-inline-3.html continuous-inline-3-ref.html
-skip-if(B2G) == continuous-inline-4a.html continuous-inline-4-ref.html
-skip-if(B2G) == continuous-inline-4b.html continuous-inline-4-ref.html
+skip-if(B2G||Mulet) == continuous-inline-4a.html continuous-inline-4-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == continuous-inline-4b.html continuous-inline-4-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == continuous-inline-5a.html continuous-inline-5-ref.html
 == continuous-inline-5b.html continuous-inline-5-ref.html
 == background-redraw-237766.html background-redraw-237766-ref.html
@@ -32,7 +32,7 @@ skip-if(B2G) == continuous-inline-4b.html continuous-inline-4-ref.html
 == background-clip-1.html background-clip-1-ref.html
 == background-clip-2.html background-clip-2-ref.html

-skip-if(B2G) == background-position-1a.html background-position-1-ref.html
+skip-if(B2G||Mulet) == background-position-1a.html background-position-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == background-position-1b.html background-position-1-ref.html
 == background-position-1c.html background-position-1-ref.html
 == background-position-2a.html background-position-2-ref.html
@@ -61,7 +61,7 @@ skip-if(B2G) == background-position-1a.html background-position-1-ref.html
 == background-size-percent-length.html background-size-length-percent-ref.html
 == background-size-percent-percent.html background-size-percent-percent-ref.html
 == background-size-length-length.html background-size-length-length-ref.html
-skip-if(B2G) == background-size-percent-percent-stretch.html background-size-percent-percent-stretch-ref.html # bug 773482
+skip-if(B2G||Mulet) == background-size-percent-percent-stretch.html background-size-percent-percent-stretch-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop

 == background-size-body-percent-percent.html background-size-body-percent-percent-ref.html
 == background-size-body-percent-percent-no-repeat.html background-size-body-percent-percent-ref.html
@@ -87,7 +87,7 @@ fails-if(smallScreen&&Android) != background-size-body-contain-no-repeat.html ba
 == background-size-contain-clip-padding-origin-border.html background-size-contain-clip-padding-origin-border-ref.html
 == background-size-contain-clip-padding-origin-border-padding.html background-size-contain-clip-padding-origin-border-padding-ref.html

-skip-if(B2G) == background-layers-1a.html background-layers-1-ref.html # bug 773482
+skip-if(B2G||Mulet) == background-layers-1a.html background-layers-1-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 fuzzy-if(OSX,1,324) == background-layers-1b.html background-layers-1-ref.html

 # box-decoration-break's effect on backgrounds is touchy and hard to test due to stretching
@@ -121,12 +121,12 @@ fails == background-size-zoom-repeat.html background-size-zoom-repeat-ref.html
 # -moz-default-background-color and -moz-default-color (bug 591341)
 == background-moz-default-background-color.html background-moz-default-background-color-ref.html

-random-if(B2G) == fixed-bg-with-transform-outside-viewport-1.html fixed-bg-with-transform-outside-viewport-ref.html
+random-if(B2G||Mulet) == fixed-bg-with-transform-outside-viewport-1.html fixed-bg-with-transform-outside-viewport-ref.html # Initial mulet triage: parity with B2G/B2G Desktop

 HTTP == root-background-1.html root-background-ref.html
 HTTP != root-background-1.html about:blank

-random-if(B2G) == really-big-background.html really-big-background-ref.html
+random-if(B2G||Mulet) == really-big-background.html really-big-background-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == body-background.html body-background-ref.html
 == table-background.html table-background-ref.html
 == table-background-print.html table-background-print-ref.html
@@ -12,27 +12,27 @@ include empty/reftest.list
 == tall--32px-auto--nonpercent-width-nonpercent-height.html ref-tall-lime32x64-aqua32x64.html
 == tall--32px-auto--nonpercent-width-nonpercent-height-viewbox.html ref-tall-lime32x64-aqua32x64.html
 == tall--32px-auto--nonpercent-width-omitted-height.html ref-tall-lime32x384-aqua32x384.html
-skip-if(B2G) == tall--32px-auto--nonpercent-width-omitted-height-viewbox.html ref-tall-lime32x256-aqua32x256.html # bug 773482
-skip-if(B2G) == tall--32px-auto--nonpercent-width-percent-height.html ref-tall-lime32x384-aqua32x384.html # bug 773482
+skip-if(B2G||Mulet) == tall--32px-auto--nonpercent-width-omitted-height-viewbox.html ref-tall-lime32x256-aqua32x256.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == tall--32px-auto--nonpercent-width-percent-height.html ref-tall-lime32x384-aqua32x384.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--32px-auto--nonpercent-width-percent-height-viewbox.html ref-tall-lime32x256-aqua32x256.html
-skip-if(B2G) == tall--32px-auto--omitted-width-nonpercent-height.html ref-tall-lime32x16-aqua32x16.html # bug 773482
+skip-if(B2G||Mulet) == tall--32px-auto--omitted-width-nonpercent-height.html ref-tall-lime32x16-aqua32x16.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--32px-auto--omitted-width-nonpercent-height-viewbox.html ref-tall-lime32x256-aqua32x256.html
 == tall--32px-auto--omitted-width-omitted-height.html ref-tall-lime32x384-aqua32x384.html
 == tall--32px-auto--omitted-width-omitted-height-viewbox.html ref-tall-lime32x256-aqua32x256.html
-skip-if(B2G) == tall--32px-auto--omitted-width-percent-height.html ref-tall-lime32x384-aqua32x384.html # bug 773482
-skip-if(B2G) == tall--32px-auto--omitted-width-percent-height-viewbox.html ref-tall-lime32x256-aqua32x256.html # bug 773482
+skip-if(B2G||Mulet) == tall--32px-auto--omitted-width-percent-height.html ref-tall-lime32x384-aqua32x384.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == tall--32px-auto--omitted-width-percent-height-viewbox.html ref-tall-lime32x256-aqua32x256.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--32px-auto--percent-width-nonpercent-height.html ref-tall-lime32x16-aqua32x16.html
 == tall--32px-auto--percent-width-nonpercent-height-viewbox.html ref-tall-lime32x256-aqua32x256.html
 == tall--32px-auto--percent-width-omitted-height.html ref-tall-lime32x384-aqua32x384.html
-skip-if(B2G) == tall--32px-auto--percent-width-omitted-height-viewbox.html ref-tall-lime32x256-aqua32x256.html # bug 773482
+skip-if(B2G||Mulet) == tall--32px-auto--percent-width-omitted-height-viewbox.html ref-tall-lime32x256-aqua32x256.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--32px-auto--percent-width-percent-height.html ref-tall-lime32x384-aqua32x384.html
-skip-if(B2G) == tall--32px-auto--percent-width-percent-height-viewbox.html ref-tall-lime32x256-aqua32x256.html # bug 773482
+skip-if(B2G||Mulet) == tall--32px-auto--percent-width-percent-height-viewbox.html ref-tall-lime32x256-aqua32x256.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop

 == tall--auto-32px--nonpercent-width-nonpercent-height.html ref-tall-lime8x16-aqua8x16.html
 == tall--auto-32px--nonpercent-width-nonpercent-height-viewbox.html ref-tall-lime8x16-aqua8x16.html
-skip-if(B2G) == tall--auto-32px--nonpercent-width-omitted-height.html ref-tall-lime8x16-aqua8x16.html # bug 773482
+skip-if(B2G||Mulet) == tall--auto-32px--nonpercent-width-omitted-height.html ref-tall-lime8x16-aqua8x16.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--auto-32px--nonpercent-width-omitted-height-viewbox.html ref-tall-lime2x16-aqua2x16.html
-skip-if(B2G) == tall--auto-32px--nonpercent-width-percent-height.html ref-tall-lime8x16-aqua8x16.html
+skip-if(B2G||Mulet) == tall--auto-32px--nonpercent-width-percent-height.html ref-tall-lime8x16-aqua8x16.html # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--auto-32px--nonpercent-width-percent-height-viewbox.html ref-tall-lime2x16-aqua2x16.html
 == tall--auto-32px--omitted-width-nonpercent-height.html ref-tall-lime256x16-aqua256x16.html
 == tall--auto-32px--omitted-width-nonpercent-height-viewbox.html ref-tall-lime2x16-aqua2x16.html
@@ -47,7 +47,7 @@ skip-if(B2G) == tall--auto-32px--nonpercent-width-percent-height.html ref-tall-l
 == tall--auto-32px--percent-width-percent-height.html ref-tall-lime256x16-aqua256x16.html
 == tall--auto-32px--percent-width-percent-height-viewbox.html ref-tall-lime2x16-aqua2x16.html

-skip-if(B2G) == tall--auto--nonpercent-width-nonpercent-height.html ref-tall-lime8x16-aqua8x16.html # bug 773482
+skip-if(B2G||Mulet) == tall--auto--nonpercent-width-nonpercent-height.html ref-tall-lime8x16-aqua8x16.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--auto--nonpercent-width-nonpercent-height-viewbox.html ref-tall-lime8x16-aqua8x16.html
 == tall--auto--nonpercent-width-omitted-height.html ref-tall-lime8x384-aqua8x384.html
 == tall--auto--nonpercent-width-omitted-height-viewbox.html ref-tall-lime8x64-aqua8x64.html
@@ -56,7 +56,7 @@ skip-if(B2G) == tall--auto--nonpercent-width-nonpercent-height.html ref-tall-lim
 == tall--auto--omitted-width-nonpercent-height.html ref-tall-lime256x16-aqua256x16.html
 == tall--auto--omitted-width-nonpercent-height-viewbox.html ref-tall-lime2x16-aqua2x16.html
 == tall--auto--omitted-width-omitted-height.html ref-tall-lime256x384-aqua256x384.html
-skip-if(B2G) == tall--auto--omitted-width-omitted-height-viewbox.html ref-tall-lime48x384-aqua48x384.html # bug 773482
+skip-if(B2G||Mulet) == tall--auto--omitted-width-omitted-height-viewbox.html ref-tall-lime48x384-aqua48x384.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--auto--omitted-width-percent-height.html ref-tall-lime256x384-aqua256x384.html
 == tall--auto--omitted-width-percent-height-viewbox.html ref-tall-lime48x384-aqua48x384.html
 == tall--auto--percent-width-nonpercent-height.html ref-tall-lime256x16-aqua256x16.html
@@ -68,8 +68,8 @@ skip-if(B2G) == tall--auto--omitted-width-omitted-height-viewbox.html ref-tall-l

 == tall--contain--nonpercent-width-nonpercent-height.html ref-tall-lime192x384-aqua192x384.html
 == tall--contain--nonpercent-width-nonpercent-height-viewbox.html ref-tall-lime192x384-aqua192x384.html
-skip-if(B2G) == tall--contain--nonpercent-width-omitted-height.html ref-tall-lime256x384-aqua256x384.html # bug 773482
-skip-if(B2G) == tall--contain--nonpercent-width-omitted-height-viewbox.html ref-tall-lime48x384-aqua48x384.html # bug 773482
+skip-if(B2G||Mulet) == tall--contain--nonpercent-width-omitted-height.html ref-tall-lime256x384-aqua256x384.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == tall--contain--nonpercent-width-omitted-height-viewbox.html ref-tall-lime48x384-aqua48x384.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == tall--contain--nonpercent-width-percent-height.html ref-tall-lime256x384-aqua256x384.html
 == tall--contain--nonpercent-width-percent-height-viewbox.html ref-tall-lime48x384-aqua48x384.html
 == tall--contain--omitted-width-nonpercent-height.html ref-tall-lime256x384-aqua256x384.html
@@ -107,12 +107,12 @@ skip-if(B2G) == tall--contain--nonpercent-width-omitted-height-viewbox.html ref-

 == wide--12px-auto--nonpercent-width-nonpercent-height.html ref-wide-lime12x24-aqua12x24.html
 == wide--12px-auto--nonpercent-width-nonpercent-height-viewbox.html ref-wide-lime12x24-aqua12x24.html
-skip-if(B2G) == wide--12px-auto--nonpercent-width-omitted-height.html ref-wide-lime12x128-aqua12x128.html
-skip-if(B2G) == wide--12px-auto--nonpercent-width-omitted-height-viewbox.html ref-wide-lime12x96-aqua12x96.html # bug 773482
+skip-if(B2G||Mulet) == wide--12px-auto--nonpercent-width-omitted-height.html ref-wide-lime12x128-aqua12x128.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == wide--12px-auto--nonpercent-width-omitted-height-viewbox.html ref-wide-lime12x96-aqua12x96.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--12px-auto--nonpercent-width-percent-height.html ref-wide-lime12x128-aqua12x128.html
 == wide--12px-auto--nonpercent-width-percent-height-viewbox.html ref-wide-lime12x96-aqua12x96.html
-skip-if(B2G) == wide--12px-auto--omitted-width-nonpercent-height.html ref-wide-lime12x16-aqua12x16.html # bug 773482
-skip-if(B2G) == wide--12px-auto--omitted-width-nonpercent-height-viewbox.html ref-wide-lime12x96-aqua12x96.html # bug 773482
+skip-if(B2G||Mulet) == wide--12px-auto--omitted-width-nonpercent-height.html ref-wide-lime12x16-aqua12x16.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == wide--12px-auto--omitted-width-nonpercent-height-viewbox.html ref-wide-lime12x96-aqua12x96.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--12px-auto--omitted-width-omitted-height.html ref-wide-lime12x128-aqua12x128.html
 == wide--12px-auto--omitted-width-omitted-height-viewbox.html ref-wide-lime12x96-aqua12x96.html
 == wide--12px-auto--omitted-width-percent-height.html ref-wide-lime12x128-aqua12x128.html
@@ -120,15 +120,15 @@ skip-if(B2G) == wide--12px-auto--omitted-width-nonpercent-height-viewbox.html re
 == wide--12px-auto--percent-width-nonpercent-height.html ref-wide-lime12x16-aqua12x16.html
 == wide--12px-auto--percent-width-nonpercent-height-viewbox.html ref-wide-lime12x96-aqua12x96.html
 == wide--12px-auto--percent-width-omitted-height.html ref-wide-lime12x128-aqua12x128.html
-skip-if(B2G) == wide--12px-auto--percent-width-omitted-height-viewbox.html ref-wide-lime12x96-aqua12x96.html # bug 773482
-skip-if(B2G) == wide--12px-auto--percent-width-percent-height.html ref-wide-lime12x128-aqua12x128.html # bug 773482
+skip-if(B2G||Mulet) == wide--12px-auto--percent-width-omitted-height-viewbox.html ref-wide-lime12x96-aqua12x96.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == wide--12px-auto--percent-width-percent-height.html ref-wide-lime12x128-aqua12x128.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--12px-auto--percent-width-percent-height-viewbox.html ref-wide-lime12x96-aqua12x96.html

 == wide--auto-32px--nonpercent-width-nonpercent-height.html ref-wide-lime8x16-aqua8x16.html
 == wide--auto-32px--nonpercent-width-nonpercent-height-viewbox.html ref-wide-lime8x16-aqua8x16.html
 == wide--auto-32px--nonpercent-width-omitted-height.html ref-wide-lime8x16-aqua8x16.html
 == wide--auto-32px--nonpercent-width-omitted-height-viewbox.html ref-wide-lime2x16-aqua2x16.html
-skip-if(B2G) == wide--auto-32px--nonpercent-width-percent-height.html ref-wide-lime8x16-aqua8x16.html # bug 773482
+skip-if(B2G||Mulet) == wide--auto-32px--nonpercent-width-percent-height.html ref-wide-lime8x16-aqua8x16.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--auto-32px--nonpercent-width-percent-height-viewbox.html ref-wide-lime2x16-aqua2x16.html
 == wide--auto-32px--omitted-width-nonpercent-height.html ref-wide-lime768x16-aqua768x16.html
 == wide--auto-32px--omitted-width-nonpercent-height-viewbox.html ref-wide-lime2x16-aqua2x16.html
@@ -143,16 +143,16 @@ skip-if(B2G) == wide--auto-32px--nonpercent-width-percent-height.html ref-wide-l
 == wide--auto-32px--percent-width-percent-height.html ref-wide-lime768x16-aqua768x16.html
 == wide--auto-32px--percent-width-percent-height-viewbox.html ref-wide-lime2x16-aqua2x16.html

-skip-if(B2G) == wide--auto--nonpercent-width-nonpercent-height.html ref-wide-lime8x16-aqua8x16.html
-skip-if(B2G) == wide--auto--nonpercent-width-nonpercent-height-viewbox.html ref-wide-lime8x16-aqua8x16.html # bug 773482
+skip-if(B2G||Mulet) == wide--auto--nonpercent-width-nonpercent-height.html ref-wide-lime8x16-aqua8x16.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == wide--auto--nonpercent-width-nonpercent-height-viewbox.html ref-wide-lime8x16-aqua8x16.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--auto--nonpercent-width-omitted-height.html ref-wide-lime8x128-aqua8x128.html
 == wide--auto--nonpercent-width-omitted-height-viewbox.html ref-wide-lime8x64-aqua8x64.html
 == wide--auto--nonpercent-width-percent-height.html ref-wide-lime8x128-aqua8x128.html
-skip-if(B2G) == wide--auto--nonpercent-width-percent-height-viewbox.html ref-wide-lime8x64-aqua8x64.html # bug 773482
+skip-if(B2G||Mulet) == wide--auto--nonpercent-width-percent-height-viewbox.html ref-wide-lime8x64-aqua8x64.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--auto--omitted-width-nonpercent-height.html ref-wide-lime768x16-aqua768x16.html
 == wide--auto--omitted-width-nonpercent-height-viewbox.html ref-wide-lime2x16-aqua2x16.html
 == wide--auto--omitted-width-omitted-height.html ref-wide-lime768x128-aqua768x128.html
-skip-if(B2G) == wide--auto--omitted-width-omitted-height-viewbox.html ref-wide-lime16x128-aqua16x128.html # bug 773482
+skip-if(B2G||Mulet) == wide--auto--omitted-width-omitted-height-viewbox.html ref-wide-lime16x128-aqua16x128.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--auto--omitted-width-percent-height.html ref-wide-lime768x128-aqua768x128.html
 == wide--auto--omitted-width-percent-height-viewbox.html ref-wide-lime16x128-aqua16x128.html
 == wide--auto--percent-width-nonpercent-height.html ref-wide-lime768x16-aqua768x16.html
@@ -164,7 +164,7 @@ skip-if(B2G) == wide--auto--omitted-width-omitted-height-viewbox.html ref-wide-l

 == wide--contain--nonpercent-width-nonpercent-height.html ref-wide-lime64x128-aqua64x128.html
 == wide--contain--nonpercent-width-nonpercent-height-viewbox.html ref-wide-lime64x128-aqua64x128.html
-skip-if(B2G) == wide--contain--nonpercent-width-omitted-height.html ref-wide-lime768x128-aqua768x128.html # bug 773482
+skip-if(B2G||Mulet) == wide--contain--nonpercent-width-omitted-height.html ref-wide-lime768x128-aqua768x128.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--contain--nonpercent-width-omitted-height-viewbox.html ref-wide-lime16x128-aqua16x128.html
 == wide--contain--nonpercent-width-percent-height.html ref-wide-lime768x128-aqua768x128.html
 == wide--contain--nonpercent-width-percent-height-viewbox.html ref-wide-lime16x128-aqua16x128.html
@@ -182,13 +182,13 @@ skip-if(B2G) == wide--contain--nonpercent-width-omitted-height.html ref-wide-lim
 == wide--contain--percent-width-percent-height-viewbox.html ref-wide-lime16x128-aqua16x128.html

 == wide--cover--nonpercent-width-nonpercent-height.html ref-wide-lime768x256.html
-skip-if(B2G) == wide--cover--nonpercent-width-nonpercent-height-viewbox.html ref-wide-lime768x256.html # bug 773482
+skip-if(B2G||Mulet) == wide--cover--nonpercent-width-nonpercent-height-viewbox.html ref-wide-lime768x256.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--cover--nonpercent-width-omitted-height.html ref-wide-lime768x128-aqua768x128.html
 == wide--cover--nonpercent-width-omitted-height-viewbox.html ref-wide-lime768x256.html
 == wide--cover--nonpercent-width-percent-height.html ref-wide-lime768x128-aqua768x128.html
 == wide--cover--nonpercent-width-percent-height-viewbox.html ref-wide-lime768x256.html
 == wide--cover--omitted-width-nonpercent-height.html ref-wide-lime768x128-aqua768x128.html
-skip-if(B2G) == wide--cover--omitted-width-nonpercent-height-viewbox.html ref-wide-lime768x256.html # bug 773482
+skip-if(B2G||Mulet) == wide--cover--omitted-width-nonpercent-height-viewbox.html ref-wide-lime768x256.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == wide--cover--omitted-width-omitted-height.html ref-wide-lime768x128-aqua768x128.html
 == wide--cover--omitted-width-omitted-height-viewbox.html ref-wide-lime768x256.html
 == wide--cover--omitted-width-percent-height.html ref-wide-lime768x128-aqua768x128.html
@@ -201,4 +201,4 @@ skip-if(B2G) == wide--cover--omitted-width-nonpercent-height-viewbox.html ref-wi
 == wide--cover--percent-width-percent-height-viewbox.html ref-wide-lime768x256.html

 == diagonal-percentage-vector-background.html diagonal-percentage-vector-background-ref.html
-== no-aspect-ratio-wide.html no-aspect-ratio-normal.html
+== no-aspect-ratio-wide.html no-aspect-ratio-normal.html
@@ -87,8 +87,8 @@ random-if(winWidget) == 305643-1.html 305643-1-ref.html # depends on windows ver
 == 409375.html 409375-ref.html
 == 413542-1.html 413542-1-ref.html
 == 413542-2.html 413542-2-ref.html
-random-if(B2G&&browserIsRemote) == 413928-1.html 413928-1-ref.html
-random-if(B2G&&browserIsRemote) == 413928-2.html 413928-2-ref.html
+random-if((B2G&&browserIsRemote)||Mulet) == 413928-1.html 413928-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+random-if((B2G&&browserIsRemote)||Mulet) == 413928-2.html 413928-2-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == 425338-1a.html 425338-1-ref.html
 == 425338-1b.html 425338-1-ref.html
 == 489517-1.html 489517-1-ref.html
@@ -119,7 +119,7 @@ fuzzy-if(/^Windows\x20NT\x206\.1/.test(http.oscpu)&&!layersGPUAccelerated&&!azur
 == 662288-1.html 662288-1-ref.html
 == 670226-1.html 670226-1-ref.html
 == 676245-1.html 676245-1-ref.html
-skip-if(B2G) == 698291-1.html 698291-1-ref.html
+skip-if(B2G||Mulet) == 698291-1.html 698291-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == 698706-1.html 698706-1-ref.html
 == 704837-1.html 704837-1-ref.html
 == 712600-1.html 712600-1-ref.html
@@ -129,7 +129,7 @@ skip-if(B2G) == 698291-1.html 698291-1-ref.html
 == 718236-1.html 718236-1-ref.html
 == 718236-2.html 718236-2-ref.html
 == 718236-3.html 718236-3-ref.html
-skip-if(B2G) == 726420-1.html 726420-1-ref.html
+skip-if(B2G||Mulet) == 726420-1.html 726420-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == 726460-1.html 726460-1-ref.html
 == 729047-1.html 729047-1-ref.html
 == 730562-1.html 730562-1-ref.html
@@ -140,7 +140,7 @@ skip-if(B2G) == 726420-1.html 726420-1-ref.html
 == 779003-1.html 779003-1-ref.html
 == 779003-1-dynamic.html 779003-1-ref.html
 == 847242-1.html 847242-1-ref.html
-skip-if(B2G&&browserIsRemote) == 869833-1.xul 869833-1-ref.xul
+skip-if((B2G&&browserIsRemote)||Mulet) == 869833-1.xul 869833-1-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
 == 922530-1.html 922530-1-ref.html
 == 922550-1.html 922550-1-ref.html
 == 1067268-1.html 1067268-1-ref.html
@@ -67,18 +67,18 @@ fuzzy-if(true,1,33) fuzzy-if(cocoaWidget,1,332) fuzzy-if(Android&&browserIsRemot
 == table-collapse-1.html table-collapse-1-ref.html # border-radius is ignored on internal table elements
 # when border-collapse: collapse

-fuzzy-if(azureQuartz,1,3) skip-if(B2G) == invalidate-1a.html invalidate-1-ref.html
-fuzzy-if(azureQuartz,1,3) skip-if(B2G) == invalidate-1b.html invalidate-1-ref.html
+fuzzy-if(azureQuartz,1,3) skip-if(B2G||Mulet) == invalidate-1a.html invalidate-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+fuzzy-if(azureQuartz,1,3) skip-if(B2G||Mulet) == invalidate-1b.html invalidate-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop

 # test that border-radius is reduced for scrollbars
-skip-if(B2G) fails-if(Android) == scrollbar-clamping-1.html scrollbar-clamping-1-ref.html
-skip-if(B2G) fails-if(Android) == scrollbar-clamping-2.html scrollbar-clamping-2-ref.html
+skip-if(B2G||Mulet) fails-if(Android) == scrollbar-clamping-1.html scrollbar-clamping-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) fails-if(Android) == scrollbar-clamping-2.html scrollbar-clamping-2-ref.html # Initial mulet triage: parity with B2G/B2G Desktop

 # Test for bad corner joins.
 fuzzy-if(true,1,1) == corner-joins-1.xhtml corner-joins-1-ref.xhtml
-skip-if(B2G) random-if(winWidget) HTTP(..) == corner-joins-2.xhtml corner-joins-2-ref.xhtml
+skip-if(B2G||Mulet) random-if(winWidget) HTTP(..) == corner-joins-2.xhtml corner-joins-2-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop

-skip-if(B2G) fuzzy-if(/^Windows\x20NT\x206\.2/.test(http.oscpu),1,20) fuzzy-if(Android&&browserIsRemote,7,146) fuzzy-if(Android&&!browserIsRemote,166,400) fails-if(Android&&AndroidVersion==15) == scroll-1.html scroll-1-ref.html # see bug 732535 #Bug 959166
+skip-if(B2G||Mulet) fuzzy-if(/^Windows\x20NT\x206\.2/.test(http.oscpu),1,20) fuzzy-if(Android&&browserIsRemote,7,146) fuzzy-if(Android&&!browserIsRemote,166,400) fails-if(Android&&AndroidVersion==15) == scroll-1.html scroll-1-ref.html # see bug 732535 #Bug 959166 # Initial mulet triage: parity with B2G/B2G Desktop

 == transforms-1.html transforms-1-ref.html

@@ -1,7 +1,7 @@
 == box-ordinal-with-out-of-flow-1.html box-ordinal-with-out-of-flow-1-ref.html
-skip-if(B2G&&browserIsRemote) == dynamic-1-remove-to-none-grouped.xul dynamic-1-ref.xul
-skip-if(B2G&&browserIsRemote) == dynamic-1-add-to-one-grouped.xul dynamic-1-ref.xul
-skip-if(B2G&&browserIsRemote) == dynamic-1-remove-to-one-grouped-1.xul dynamic-1-ref.xul
-fails skip-if(B2G&&browserIsRemote) == dynamic-1-remove-to-one-grouped-2.xul dynamic-1-ref.xul # bug 575500
-skip-if(B2G&&browserIsRemote) == dynamic-1-add-to-two-grouped-1.xul dynamic-1-ref.xul
-skip-if(B2G&&browserIsRemote) == dynamic-1-add-to-two-grouped-2.xul dynamic-1-ref.xul
+skip-if((B2G&&browserIsRemote)||Mulet) == dynamic-1-remove-to-none-grouped.xul dynamic-1-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) == dynamic-1-add-to-one-grouped.xul dynamic-1-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) == dynamic-1-remove-to-one-grouped-1.xul dynamic-1-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+fails skip-if((B2G&&browserIsRemote)||Mulet) == dynamic-1-remove-to-one-grouped-2.xul dynamic-1-ref.xul # bug 575500 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) == dynamic-1-add-to-two-grouped-1.xul dynamic-1-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if((B2G&&browserIsRemote)||Mulet) == dynamic-1-add-to-two-grouped-2.xul dynamic-1-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
@@ -19,12 +19,12 @@
 == box-sizing-minmax-height.html box-sizing-minmax-height-ref.html
 == box-sizing-minmax-width.html box-sizing-minmax-width-ref.html
 == box-sizing-mozbox-minmax-height.html box-sizing-mozbox-minmax-height-ref.html
-skip-if(B2G) == abspos-non-replaced-width-offset-margin.html abspos-non-replaced-width-offset-margin-ref.html
-skip-if(B2G) == abspos-replaced-width-offset-margin.html abspos-replaced-width-offset-margin-ref.html
-skip-if(B2G) HTTP(..) == CSS21-t100301.xhtml CSS21-t100301-ref.xhtml
-random-if(B2G) == CSS21-t100303.xhtml CSS21-t100303-ref.xhtml
-random-if(B2G) == CSS21-t100303-simple.xhtml CSS21-t100303-ref.xhtml
-random-if(B2G) == CSS21-t100801-vertical-align.xhtml CSS21-t100801-vertical-align-ref.xhtml
+skip-if(B2G||Mulet) == abspos-non-replaced-width-offset-margin.html abspos-non-replaced-width-offset-margin-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == abspos-replaced-width-offset-margin.html abspos-replaced-width-offset-margin-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) HTTP(..) == CSS21-t100301.xhtml CSS21-t100301-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
+random-if(B2G||Mulet) == CSS21-t100303.xhtml CSS21-t100303-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
+random-if(B2G||Mulet) == CSS21-t100303-simple.xhtml CSS21-t100303-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
+random-if(B2G||Mulet) == CSS21-t100801-vertical-align.xhtml CSS21-t100801-vertical-align-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
 == clip-auto.html clip-auto-ref.html
 == clip-rect-auto.html clip-rect-auto-ref.html
 == width-rounding.html width-rounding-ref.html
@@ -9,12 +9,12 @@ random != boxshadow-blur-2.html boxshadow-blur-2-notref.html # fixedpoint divisi
 == tableboxshadow-trshadow.html tableboxshadow-trshadow-ref.html
 == tableboxshadow-tdshadow.html tableboxshadow-tdshadow-ref.html
 == boxshadow-rounding.html boxshadow-rounding-ref.html
-fails-if(Android||B2G) == boxshadow-button.html boxshadow-button-ref.html
-fails-if(Android||B2G) == boxshadow-fileupload.html boxshadow-fileupload-ref.html
+fails-if(Android||B2G||Mulet) == boxshadow-button.html boxshadow-button-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G||Mulet) == boxshadow-fileupload.html boxshadow-fileupload-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == boxshadow-inner-basic.html boxshadow-inner-basic-ref.svg
 random-if(layersGPUAccelerated) == boxshadow-mixed.html boxshadow-mixed-ref.html
 random-if(d2d) fuzzy-if(B2G,12,18) == boxshadow-rounded-spread.html boxshadow-rounded-spread-ref.html
-skip-if(B2G&&browserIsRemote) HTTP(..) == boxshadow-dynamic.xul boxshadow-dynamic-ref.xul
+skip-if((B2G&&browserIsRemote)||Mulet) HTTP(..) == boxshadow-dynamic.xul boxshadow-dynamic-ref.xul # Initial mulet triage: parity with B2G/B2G Desktop
 random-if(d2d) == boxshadow-onecorner.html boxshadow-onecorner-ref.html
 random-if(d2d) == boxshadow-twocorners.html boxshadow-twocorners-ref.html
 random-if(d2d) == boxshadow-threecorners.html boxshadow-threecorners-ref.html
@@ -25,7 +25,7 @@ random-if(d2d) == boxshadow-threecorners.html boxshadow-threecorners-ref.html
 == overflow-not-scrollable-1.html overflow-not-scrollable-1-ref.html
 == overflow-not-scrollable-1.html overflow-not-scrollable-1-ref2.html
 == overflow-not-scrollable-2.html overflow-not-scrollable-2-ref.html
-fails-if(B2G) == 611574-1.html 611574-1-ref.html
-fails-if(B2G) == 611574-2.html 611574-2-ref.html
+fails-if(B2G||Mulet) == 611574-1.html 611574-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(B2G||Mulet) == 611574-2.html 611574-2-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 fuzzy-if(winWidget,5,30) == fieldset.html fieldset-ref.html # minor anti-aliasing problem on Windows
 fuzzy-if(winWidget,5,30) == fieldset-inset.html fieldset-inset-ref.html # minor anti-aliasing problem on Windows
@@ -5,7 +5,7 @@
 == flexbox-abspos-container-2.html  flexbox-abspos-container-2-ref.html
 == flexbox-attributes-no-box-horizontal.xhtml flexbox-attributes-no-box-horizontal-ref.xhtml
 == flexbox-attributes-no-box-vertical.xhtml flexbox-attributes-no-box-vertical-ref.xhtml
-skip-if(B2G) == flexbox-attributes-no-input-horizontal.xhtml flexbox-attributes-no-input-horizontal-ref.xhtml
-skip-if(B2G) == flexbox-attributes-no-input-vertical.xhtml flexbox-attributes-no-input-vertical-ref.xhtml
+skip-if(B2G||Mulet) == flexbox-attributes-no-input-horizontal.xhtml flexbox-attributes-no-input-horizontal-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == flexbox-attributes-no-input-vertical.xhtml flexbox-attributes-no-input-vertical-ref.xhtml # Initial mulet triage: parity with B2G/B2G Desktop
 == flexbox-child-is-abspos-container-1.html flexbox-child-is-abspos-container-1-ref.html
 == flexbox-child-is-abspos-container-2.html flexbox-child-is-abspos-container-2-ref.html
@@ -1,12 +1,12 @@
 == default-size.html default-size-ref.html
-skip-if(B2G) fuzzy-if(Android&&AndroidVersion>=15,8,1000) == size-1.html size-1-ref.html
+skip-if(B2G||Mulet) fuzzy-if(Android&&AndroidVersion>=15,8,1000) == size-1.html size-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop

 == empty-transaction-1.html empty-transaction-1-ref.html

 == image-rendering-test.html image-rendering-ref.html
 == image-shadow.html image-shadow-ref.html

-skip-if(B2G) asserts-if(cocoaWidget,0-2) == size-change-1.html size-change-1-ref.html
+skip-if(B2G||Mulet) asserts-if(cocoaWidget,0-2) == size-change-1.html size-change-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop

 random-if(cocoaWidget) == subpixel-1.html about:blank

@@ -27,8 +27,8 @@ random-if(cocoaWidget) == subpixel-1.html about:blank
 == text-ltr-alignment-test.html text-ltr-alignment-ref.html
 == text-rtl-alignment-test.html text-rtl-alignment-ref.html

-fuzzy-if(B2G&&azureSkiaGL,1,256) == text-horzline-with-bottom.html text-horzline.html
-fuzzy-if(B2G&&azureSkiaGL,1,256) == text-horzline-with-top.html text-horzline.html
+fuzzy-if((B2G||Mulet)&&azureSkiaGL,1,256) == text-horzline-with-bottom.html text-horzline.html # Initial mulet triage: parity with B2G/B2G Desktop
+fuzzy-if((B2G||Mulet)&&azureSkiaGL,1,256) == text-horzline-with-top.html text-horzline.html # Initial mulet triage: parity with B2G/B2G Desktop

 != text-big-stroke.html text-blank.html
 != text-big-stroke.html text-big-fill.html
@@ -45,7 +45,7 @@ fuzzy-if(azureSkiaGL,10,400) == text-not-in-doc-test.html text-not-in-doc-ref.ht
 != text-bidi-ltr-test.html text-bidi-ltr-notref.html # for bug 698185
 == text-bidi-rtl-test.html text-bidi-rtl-ref.html

-skip-if(B2G) != text-font-lang.html text-font-lang-notref.html
+skip-if(B2G||Mulet) != text-font-lang.html text-font-lang-notref.html # Initial mulet triage: parity with B2G/B2G Desktop

 == text-measure.html text-measure-ref.html
 == text-small-caps-1.html text-small-caps-1-ref.html
@@ -22,11 +22,11 @@ HTTP(..) == columnfill-balance.html columnfill-balance-ref.html
 HTTP(..) == columnfill-auto.html columnfill-auto-ref.html
 HTTP(..) == columnfill-auto-2.html columnfill-auto-2-ref.html
 HTTP(..) == columnfill-auto-3.html columnfill-auto-2-ref.html
-skip-if(B2G) == columnrule-basic.html columnrule-basic-ref.html # bug 773482
-skip-if(B2G) == columnrule-complex.html columnrule-complex-ref.html # bug 773482
+skip-if(B2G||Mulet) == columnrule-basic.html columnrule-basic-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == columnrule-complex.html columnrule-complex-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 != columnrule-linestyles.html columnrule-linestyles-notref.html
 == columnrule-padding.html columnrule-padding-ref.html
-skip-if(B2G) == columnfill-overflow.html columnfill-overflow-ref.html # bug 773482
+skip-if(B2G||Mulet) == columnfill-overflow.html columnfill-overflow-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
 == margin-collapsing-bug616722-1.html margin-collapsing-bug616722-1-ref.html
 == margin-collapsing-bug616722-2.html margin-collapsing-bug616722-2-ref.html
 == column-balancing-nested-000.html column-balancing-nested-000-ref.html
@@ -14,7 +14,7 @@
 == system-extends-invalid.html    system-extends-invalid-ref.html
 == descriptor-negative.html descriptor-negative-ref.html
 == descriptor-prefix.html   descriptor-prefix-ref.html
-fails-if(B2G) == descriptor-suffix.html   descriptor-suffix-ref.html # B2G kerning
+fails-if(B2G||Mulet) == descriptor-suffix.html   descriptor-suffix-ref.html # B2G kerning # Initial mulet triage: parity with B2G/B2G Desktop
 == descriptor-range.html    descriptor-range-ref.html
 == descriptor-pad.html      descriptor-pad-ref.html
 == descriptor-fallback.html descriptor-fallback-ref.html
@@ -1,9 +1,9 @@
 == button-fieldset-1.html button-fieldset-ref.html
-fails-if(Android||B2G) == button-fieldset-2.html button-fieldset-ref.html
-fails-if(Android||B2G) == button-fieldset-3.html button-fieldset-ref.html
+fails-if(Android||B2G||Mulet) == button-fieldset-2.html button-fieldset-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G||Mulet) == button-fieldset-3.html button-fieldset-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == button-fieldset-4.html button-fieldset-ref.html
 == button-fieldset-legend-1.html button-fieldset-legend-ref-1.html
-fails-if(Android||B2G) == button-fieldset-legend-2.html button-fieldset-legend-ref-2.html
-fails-if(Android||B2G) == button-fieldset-legend-3.html button-fieldset-legend-ref-3.html
+fails-if(Android||B2G||Mulet) == button-fieldset-legend-2.html button-fieldset-legend-ref-2.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G||Mulet) == button-fieldset-legend-3.html button-fieldset-legend-ref-3.html # Initial mulet triage: parity with B2G/B2G Desktop
 == button-fieldset-legend-4.html button-fieldset-legend-ref-4.html
 == button-fieldset-legend-5.html button-fieldset-legend-ref-5.html
@@ -1,9 +1,9 @@
 == select-fieldset-1.html select-fieldset-ref.html
-fails-if(Android||B2G) == select-fieldset-2.html select-fieldset-ref-disabled.html
-fails-if(Android||B2G) == select-fieldset-3.html select-fieldset-ref-disabled.html
+fails-if(Android||B2G||Mulet) == select-fieldset-2.html select-fieldset-ref-disabled.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G||Mulet) == select-fieldset-3.html select-fieldset-ref-disabled.html # Initial mulet triage: parity with B2G/B2G Desktop
 == select-fieldset-4.html select-fieldset-ref.html
 == select-fieldset-legend-1.html select-fieldset-legend-ref-1.html
-fails-if(Android||B2G) == select-fieldset-legend-2.html select-fieldset-legend-ref-2.html
-fails-if(Android||B2G) == select-fieldset-legend-3.html select-fieldset-legend-ref-3.html
+fails-if(Android||B2G||Mulet) == select-fieldset-legend-2.html select-fieldset-legend-ref-2.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G||Mulet) == select-fieldset-legend-3.html select-fieldset-legend-ref-3.html # Initial mulet triage: parity with B2G/B2G Desktop
 == select-fieldset-legend-4.html select-fieldset-legend-ref-4.html
 == select-fieldset-legend-5.html select-fieldset-legend-ref-5.html
@@ -1,9 +1,9 @@
 == button-fieldset-1.html button-fieldset-ref.html
-fails-if(Android||B2G) == button-fieldset-2.html button-fieldset-ref.html
-fails-if(Android||B2G) == button-fieldset-3.html button-fieldset-ref.html
+fails-if(Android||B2G||Mulet) == button-fieldset-2.html button-fieldset-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G||Mulet) == button-fieldset-3.html button-fieldset-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == button-fieldset-4.html button-fieldset-ref.html
 == button-fieldset-legend-1.html button-fieldset-legend-ref-1.html
-fails-if(Android||B2G) == button-fieldset-legend-2.html button-fieldset-legend-ref-2.html
-fails-if(Android||B2G) == button-fieldset-legend-3.html button-fieldset-legend-ref-3.html
+fails-if(Android||B2G||Mulet) == button-fieldset-legend-2.html button-fieldset-legend-ref-2.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(Android||B2G||Mulet) == button-fieldset-legend-3.html button-fieldset-legend-ref-3.html # Initial mulet triage: parity with B2G/B2G Desktop
 == button-fieldset-legend-4.html button-fieldset-legend-ref-4.html
 == button-fieldset-legend-5.html button-fieldset-legend-ref-5.html
@@ -1,9 +1,9 @@
 == select-fieldset-1.html select-fieldset-ref.html
-fails-if(B2G) == select-fieldset-2.html select-fieldset-ref-disabled.html
-fails-if(B2G) == select-fieldset-3.html select-fieldset-ref-disabled.html
+fails-if(B2G||Mulet) == select-fieldset-2.html select-fieldset-ref-disabled.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(B2G||Mulet) == select-fieldset-3.html select-fieldset-ref-disabled.html # Initial mulet triage: parity with B2G/B2G Desktop
 == select-fieldset-4.html select-fieldset-ref.html
 == select-fieldset-legend-1.html select-fieldset-legend-ref-1.html
-fails-if(B2G) == select-fieldset-legend-2.html select-fieldset-legend-ref-2.html
-fails-if(B2G) == select-fieldset-legend-3.html select-fieldset-legend-ref-3.html
+fails-if(B2G||Mulet) == select-fieldset-legend-2.html select-fieldset-legend-ref-2.html # Initial mulet triage: parity with B2G/B2G Desktop
+fails-if(B2G||Mulet) == select-fieldset-legend-3.html select-fieldset-legend-ref-3.html # Initial mulet triage: parity with B2G/B2G Desktop
 == select-fieldset-legend-4.html select-fieldset-legend-ref-4.html
 == select-fieldset-legend-5.html select-fieldset-legend-ref-5.html
@@ -130,9 +130,9 @@ fuzzy-if(!contentSameGfxBackendAsCanvas,2,20000) fuzzy-if(azureSkiaGL,8,20000) f
 fuzzy-if(!contentSameGfxBackendAsCanvas,2,20000) fuzzy-if(azureSkiaGL,8,20000) fuzzy-if(azureQuartz&&OSX==1006,2,7878) == aja-linear-5a.html aja-linear-5-ref.html
 fuzzy-if(!contentSameGfxBackendAsCanvas,2,16477) fuzzy-if(azureSkiaGL,8,20000) fuzzy-if(azureQuartz,2,10163) == aja-linear-6a.html aja-linear-6-ref.html # bug 526708
 fails == aja-linear-6b.html aja-linear-6-ref.html # bug 522607
-skip-if(B2G) == height-dependence-1.html height-dependence-1-ref.html
-skip-if(B2G) fuzzy-if(cocoaWidget,1,40000) == height-dependence-2.html height-dependence-2-ref.html
-skip-if(B2G) == height-dependence-3.html height-dependence-3-ref.html
+skip-if(B2G||Mulet) == height-dependence-1.html height-dependence-1-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) fuzzy-if(cocoaWidget,1,40000) == height-dependence-2.html height-dependence-2-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == height-dependence-3.html height-dependence-3-ref.html # Initial mulet triage: parity with B2G/B2G Desktop

 == linear-onestopposition-1.html linear-onestopposition-1-ref.html
 fuzzy-if(d2d,47,400) == linear-onestopposition-1.html linear-onestopposition-1-ref2.html # d2d interpolates the hard stop
@@ -1,4 +1,4 @@
-skip-if(B2G) == 290018-1.html 290018-ref.html
+skip-if(B2G||Mulet) == 290018-1.html 290018-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == 436261-1.html 436261-ref.html
 == 436261-2.html 436261-ref.html
 == 436261-3.html 436261-ref.html
@@ -6,5 +6,5 @@ skip-if(B2G) == 290018-1.html 290018-ref.html
 == 444723-2.html 444723-ref.html
 == 445415-1a.xhtml 445415-1-ref.xhtml
 == 445415-1b.xhtml 445415-1-ref.xhtml
-skip-if(B2G) == 445415-2a.xhtml 445415-2-ref.xhtml # bug 773482
-skip-if(B2G) == 445415-2b.xhtml 445415-2-ref.xhtml # bug 773482
+skip-if(B2G||Mulet) == 445415-2a.xhtml 445415-2-ref.xhtml # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == 445415-2b.xhtml 445415-2-ref.xhtml # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
@@ -1,7 +1,7 @@
 == input-valid.html input-ref.html
 fuzzy(11,4) == input-customerror.html input-ref.html
-skip-if(B2G) == input-disabled.html input-ref.html
-skip-if(B2G) == input-dyn-disabled.html input-ref.html
+skip-if(B2G||Mulet) == input-disabled.html input-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) == input-dyn-disabled.html input-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 == input-dyn-not-disabled.html input-ref.html
 == input-readonly.html input-ref.html
 == input-dyn-readonly.html input-ref.html
@@ -1,12 +1,12 @@
 needs-focus == select-valid.html select-ref.html
 needs-focus == select-invalid.html select-ref.html
 needs-focus == select-disabled.html select-disabled-ref.html
-skip-if(B2G) needs-focus == select-dyn-disabled.html select-disabled-ref.html
+skip-if(B2G||Mulet) needs-focus == select-dyn-disabled.html select-disabled-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 needs-focus == select-dyn-not-disabled.html select-ref.html
 needs-focus == select-required-invalid.html select-required-ref.html
 needs-focus == select-required-valid.html select-required-ref.html
 needs-focus == select-required-multiple-invalid.html select-required-multiple-ref.html
 needs-focus == select-required-multiple-valid.html select-required-multiple-ref.html
-skip-if(B2G) fails-if(Android) needs-focus == select-disabled-fieldset-1.html select-fieldset-ref.html
-skip-if(B2G) fails-if(Android) needs-focus == select-disabled-fieldset-2.html select-fieldset-ref.html
+skip-if(B2G||Mulet) fails-if(Android) needs-focus == select-disabled-fieldset-1.html select-fieldset-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
+skip-if(B2G||Mulet) fails-if(Android) needs-focus == select-disabled-fieldset-2.html select-fieldset-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
 needs-focus == select-fieldset-legend.html select-fieldset-legend-ref.html
--- a/Show More
+++ b/Show More