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

- bug 1215748 - use llvm-dsymutil for mac builds. r=mshal (a217006d89)
- warnings (31ea43d0d8)
- Bug 1175154 - Unit tests for IAC on 3.0. r=ferjm (12c424bab3)
- Bug 1219543 - Part 1: isRunningOnCompositor flag is now a member of AnimationProperty. r=bbirtles (85bc668501)
- Bug 1219543 - Part 2: Avoid the period that mIsRunningOnCompositor is false between restyling and building display list. r=bbirtles (597e46d479)
- Bug 1219543 - Part 3: MutationObserver should disconnect when the test is finished. r=bbirtles (70c26a266e)
- Bug 1214148 - patch 1 - propagation from the nested iframe back to the toplevel iframe, r=alwu (b42002f43a)
- Bug 1214148 - patch 2 - from toplevel iframe to the nested iframe, r=alwu (7b07fe5399)
- Bug 1214148 - patch 3 - correct window for nested iframes, r=alwu (27ee08caf1)
- Bug 1166910 - put referrer attribute behind pref in webidl, r=bz (93e421fa1b)
- Bug 1187357 - rename referrer attribute to referrerpolicy. r=hsivonen (70c67f5def)
- Bug 1187357 - Generated code for renaming referrer to referrerpolicy in html parser. r=hsivonen (738de3f278)
- Bug 1221341. Snap box shadow clip rect to device pixels. r=mstange (b63b783714)
- Bug 1228634 - Implement Element.getAttributeNames, r=peterv (4594d9c14c)
- Bug 1216193. Implement webkitMatchesSelector. r=khuey (39742b7e0b)
- Bug 1134648, handle dynamic changes to rel=dns-prefetch, r=bz (e27638080e)
- Bug 1229962 - use UniquePtr<T[]> instead of nsAutoArrayPtr<T> in parser/html/; r=hsivonen (75de6314f1)
- Bug 1226437 - Speculative CSP should set speculative referrer policy instead of actual referrer policy. r=sicking (f7dfd3fd18)
- Bug 1227554 - Default to NullPrincipal if doc is not available within expatdriver. r=bz (336a562965)
- Bug 1215781 - Use MOZ_UTF16 to generate sTagUnicodeTable. r=mrbkap (eca371a36b)
- Bug 1082598 - Part 5: Fix NPAPI for Skia update. r=jrmuizel (25c4d080ab)
- Bug 1183828 - Remove 'nsWindow::GetNativeData not implemented for this type' warning. r=roc (0a60404b57)
- Bug 1224445 - Add NS_NATIVE_OPENGL_CONTEXT handling to nsWindow::GetNativeData() r=mwu (ee35844be4)
- Bug 1179632 part.1 native IME context should not be stored in InputContext but should be able to retrieve with nsIWidget::GetNativeData() r=smaug (5f1804bb72)
- Bug 1179632 part.2 WidgetCompositionEvent should store NativeIMEContext which caused the event and PuppetWidget should store it for GetNativeIMEContext() r=smaug, sr=smaug (e00ca78e3f)
- Bug 1179632 part.3 TabParent::RecvEndIMEComposition() shouldn't return true with aNoCompositionEvent when there is no widget r=smaug (ee065ed491)
- Bug 1179632 part.4 Clean up the code to request IME to commit composition across process boundary r=smaug (9567c4dc57)
- Bug 1179632 part.5 WidgetCompositionEvent::mNativeIMEContext should be used at looking for a TextComposition instance for a WidgetCompositionEvent r=smaug (f4e27ec28c)
- Bug 1179632 part.6 KeyboardEvent.isComposing shouldn't expose IME state on different document r=smaug (ca8b8a6a02)
- Bug 1227544 - Scaling on 720p devices is broken. r=timdream (cb89af839f)

dom/browser-element/BrowserElementAudioChannel.cpp

@@ -7,6 +7,8 @@
 #include "mozilla/Services.h"
 #include "mozilla/dom/BrowserElementAudioChannelBinding.h"
 #include "mozilla/dom/DOMRequest.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/TabParent.h"
 #include "mozilla/dom/Promise.h"
 #include "mozilla/dom/PromiseNativeHandler.h"
 #include "mozilla/dom/ToJSValue.h"
@@ -23,16 +25,6 @@
 #include "nsPIDOMWindow.h"
 #include "nsServiceManagerUtils.h"
 
-namespace {
-
-void
-AssertIsInMainProcess()
-{
-  MOZ_ASSERT(XRE_GetProcessType() == GeckoProcessType_Default);
-}
-
-} // anonymous namespace
-
 namespace mozilla {
 namespace dom {
 
@@ -89,7 +81,6 @@ BrowserElementAudioChannel::BrowserElementAudioChannel(
   , mState(eStateUnknown)
 {
   MOZ_ASSERT(NS_IsMainThread());
-  AssertIsInMainProcess();
 
   nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
   if (obs) {
@@ -107,7 +98,6 @@ BrowserElementAudioChannel::BrowserElementAudioChannel(
 BrowserElementAudioChannel::~BrowserElementAudioChannel()
 {
   MOZ_ASSERT(NS_IsMainThread());
-  AssertIsInMainProcess();
 
   nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
   if (obs) {
@@ -173,8 +163,6 @@ AudioChannel
 BrowserElementAudioChannel::Name() const
 {
   MOZ_ASSERT(NS_IsMainThread());
-  AssertIsInMainProcess();
-
   return mAudioChannel;
 }
 
@@ -361,7 +349,6 @@ already_AddRefed<dom::DOMRequest>
 BrowserElementAudioChannel::GetVolume(ErrorResult& aRv)
 {
   MOZ_ASSERT(NS_IsMainThread());
-  AssertIsInMainProcess();
 
   if (!mFrameWindow) {
     nsCOMPtr<nsIDOMDOMRequest> request;
@@ -387,7 +374,6 @@ already_AddRefed<dom::DOMRequest>
 BrowserElementAudioChannel::SetVolume(float aVolume, ErrorResult& aRv)
 {
   MOZ_ASSERT(NS_IsMainThread());
-  AssertIsInMainProcess();
 
   if (!mFrameWindow) {
     nsCOMPtr<nsIDOMDOMRequest> request;
@@ -420,7 +406,6 @@ already_AddRefed<dom::DOMRequest>
 BrowserElementAudioChannel::GetMuted(ErrorResult& aRv)
 {
   MOZ_ASSERT(NS_IsMainThread());
-  AssertIsInMainProcess();
 
   if (!mFrameWindow) {
     nsCOMPtr<nsIDOMDOMRequest> request;
@@ -446,7 +431,6 @@ already_AddRefed<dom::DOMRequest>
 BrowserElementAudioChannel::SetMuted(bool aMuted, ErrorResult& aRv)
 {
   MOZ_ASSERT(NS_IsMainThread());
-  AssertIsInMainProcess();
 
   if (!mFrameWindow) {
     nsCOMPtr<nsIDOMDOMRequest> request;
@@ -479,7 +463,6 @@ already_AddRefed<dom::DOMRequest>
 BrowserElementAudioChannel::IsActive(ErrorResult& aRv)
 {
   MOZ_ASSERT(NS_IsMainThread());
-  AssertIsInMainProcess();
 
   if (mState != eStateUnknown) {
     RefPtr<DOMRequest> domRequest = new DOMRequest(GetOwner());
@@ -593,8 +576,29 @@ BrowserElementAudioChannel::Observe(nsISupports* aSubject, const char* aTopic,
   }
 
   nsCOMPtr<nsISupportsPRUint64> wrapper = do_QueryInterface(aSubject);
-  if (NS_WARN_IF(!wrapper)) {
-    return NS_ERROR_FAILURE;
+  // This can be a nested iframe.
+  if (!wrapper) {
+    nsCOMPtr<nsITabParent> iTabParent = do_QueryInterface(aSubject);
+    if (!iTabParent) {
+      return NS_ERROR_FAILURE;
+    }
+
+    RefPtr<TabParent> tabParent = TabParent::GetFrom(iTabParent);
+    if (!tabParent) {
+      return NS_ERROR_FAILURE;
+    }
+
+    Element* element = tabParent->GetOwnerElement();
+    if (!element) {
+      return NS_ERROR_FAILURE;
+    }
+
+    nsCOMPtr<nsPIDOMWindow> window = element->OwnerDoc()->GetWindow();
+    if (window == mFrameWindow) {
+      ProcessStateChanged(aData);
+    }
+
+    return NS_OK;
   }
 
   uint64_t windowID;