Bug 1180355 - Initialize the AudioChannelAgent after AudioContext has gained a stable refcount; r=baku

dom/media/webaudio/AudioContext.cpp

@@ -105,6 +105,11 @@ AudioContext::AudioContext(nsPIDOMWindow* aWindow,
   // bound to the window.
   mDestination = new AudioDestinationNode(this, aIsOffline, aChannel,
                                           aNumberOfChannels, aLength, aSampleRate);
+}
+
+void
+AudioContext::Init()
+{
   // We skip calling SetIsOnlyNodeForContext and the creation of the
   // audioChannelAgent during mDestination's constructor, because we can only
   // call them after mDestination has been set up.
@@ -145,6 +150,7 @@ AudioContext::Constructor(const GlobalObject& aGlobal,
   nsRefPtr<AudioContext> object =
     new AudioContext(window, false,
                      AudioChannelService::GetDefaultAudioChannel());
+  object->Init();
 
   RegisterWeakMemoryReporter(object);
 
@@ -163,6 +169,7 @@ AudioContext::Constructor(const GlobalObject& aGlobal,
   }
 
   nsRefPtr<AudioContext> object = new AudioContext(window, false, aChannel);
+  object->Init();
 
   RegisterWeakMemoryReporter(object);
 

dom/media/webaudio/AudioContext.h

@@ -101,6 +101,8 @@ class AudioContext final : public DOMEventTargetHelper,
                float aSampleRate = 0.0f);
   ~AudioContext();
 
+  void Init();
+
 public:
   typedef uint64_t AudioContextId;