Backed out changeset ddc08e87843f (bug 1184058) for AudioChannelAgent crashes/asserts.

dom/audiochannel/AudioChannelAgent.cpp

@@ -103,10 +103,7 @@ AudioChannelAgent::InitInternal(nsIDOMWindow* aWindow, int32_t aChannelType,
     return NS_ERROR_FAILURE;
   }
 
-  if (NS_WARN_IF(!aWindow)) {
-    return NS_ERROR_FAILURE;
-  }
-
+  if (aWindow) {
     nsCOMPtr<nsPIDOMWindow> pInnerWindow = do_QueryInterface(aWindow);
     MOZ_ASSERT(pInnerWindow->IsInnerWindow());
     mInnerWindowID = pInnerWindow->WindowID();
@@ -117,9 +114,6 @@ AudioChannelAgent::InitInternal(nsIDOMWindow* aWindow, int32_t aChannelType,
     if (mWindow) {
       mWindow = mWindow->GetOuterWindow();
     }
-
-  if (!mWindow) {
-    return NS_ERROR_FAILURE;
   }
 
   mAudioChannelType = aChannelType;
@@ -140,13 +134,6 @@ NS_IMETHODIMP AudioChannelAgent::NotifyStartedPlaying(uint32_t aNotifyPlayback,
   MOZ_ASSERT(aVolume);
   MOZ_ASSERT(aMuted);
 
-  // Window-less AudioChannelAgents are muted by default.
-  if (!mWindow) {
-    *aVolume = 0;
-    *aMuted = true;
-    return NS_OK;
-  }
-
   nsRefPtr<AudioChannelService> service = AudioChannelService::GetOrCreate();
   if (mAudioChannelType == AUDIO_AGENT_CHANNEL_ERROR ||
       service == nullptr || mIsRegToService) {