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

- Bug 1158344 part 1 - Use the an instruction which is not a beta node for hoisting bounds checks. r=sunfish (2174d2c83)
- Bug 1158344 part 2 - Do not produce upper bounds check if the condition is always verified. r=sunfish (dd93b1595)
- Bug 1160911 - JIT: precise shift right derived result range for all int32 input ranges. r=sunfish (87589affe)
- Bug 1055473 - Make WeakMap/Set.prototype a plain object. r=Waldo (07835bfde)
- Bug 1055473 - Actually disable the web-platform test ON CLOSED TREE (3e8601a23)
- Bug 1157239 - Give MGuardShape and friends a resultTypeSet. r=h4writer (63b4fedb7)
- Bug 1124870 - Use LookupPropertyPure instead of LookupProperty in IsCacheableDOMProxyUnshadowedSetterCall. r=evilpie (57dc89ac7)
- Bug 1162078 - Ignore timeouts for some CGC tests r=terrence DONTBUILD (ac4468c9d)
- Bug 967544 - make gServiceInterrupt Atomic; r=Waldo (bb34afcc6)
- Bug 1178998 - Identify which hang detector reports a hang. r=billm (b2f9d3184)
- Bug 1133391 - Remove unused variables in TabParent::RecvDispatchAfterKeyboardEvent. r=smaug. (a7a9b985f)
- Bug 1180125 part 0 - Fix an obvious bug in animation_utils.js; r=dbaron (f5729da0e)
- Bug 1183223 - Create a markers directory temporarily inside docshell/base where all marker logic should go into, r=smaug (56b821e0a)
- Bug 1183228 - Use separate files for AutoTimelineMarker and AutoGlobalTimelineMarker, r=smaug (38fbe5409)
- Bug 1183229 - Add a way to count the number of timeline-observed docshells outside of nsDocShell, r=smaug (ee6e7d081)
- Bug 1183231 - Maintain a list of timeline-observed docshells outside of nsDocShell, r=smaug (b2f6a778b)
- Bug 1183235 - Keep the dochsell-specific markers inside a ObservedDocShell managed list instead of nsDocShell, r=smaug (50d45b9b2)
- Bug 1137109 move the displaylist tracing inside nsViewManager::ProcessPendingUpdates, r=benwa, mattwoodrow (2bebfe820)
- Bug 1184376 - Remove nsDocShell::AddProfileTimelineMarker, r=smaug (db31f7621)

docshell/base/timeline/ObservedDocShell.cpp

@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "ObservedDocShell.h"
+
+#include "TimelineMarker.h"
+#include "mozilla/Move.h"
+
+namespace mozilla {
+
+ObservedDocShell::ObservedDocShell(nsDocShell* aDocShell)
+  : mDocShell(aDocShell)
+{}
+
+void
+ObservedDocShell::AddMarker(const char* aName, TracingMetadata aMetaData)
+{
+  TimelineMarker* marker = new TimelineMarker(mDocShell, aName, aMetaData);
+  mTimelineMarkers.AppendElement(marker);
+}
+
+void
+ObservedDocShell::AddMarker(UniquePtr<TimelineMarker>&& aMarker)
+{
+  mTimelineMarkers.AppendElement(Move(aMarker));
+}
+
+void
+ObservedDocShell::ClearMarkers()
+{
+  mTimelineMarkers.Clear();
+}
+
+} // namespace mozilla