Bug 1388668 - Replace NS_DispatchToCurrentThread call with AbstractThread dispatch. r=padenot

We should be dispatching this event to a tab group so that it can be
associated with it.


MozReview-Commit-ID: FcEQD7cN2Xj

--HG--
extra : rebase_source : fbe7c17439a9434ac1c4702f0dd21e8424a7f0c7

dom/media/webaudio/AudioDestinationNode.cpp

@@ -406,10 +406,11 @@ AudioDestinationNode::DestroyMediaStream()
 void
 AudioDestinationNode::NotifyMainThreadStreamFinished()
 {
+  MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(mStream->IsFinished());
 
   if (mIsOffline) {
-    NS_DispatchToCurrentThread(
+    AbstractMainThread()->Dispatch(
       NewRunnableMethod("dom::AudioDestinationNode::FireOfflineCompletionEvent",
                         this,
                         &AudioDestinationNode::FireOfflineCompletionEvent));