Bug 1190676 - Part 9 - Fix consumers: AudioCapture. r=roc

--HG--
extra : rebase_source : b099a3682e305c3ebe02600a08b68c9f547991f0

dom/html/HTMLMediaElement.cpp

@@ -4710,7 +4710,9 @@ NS_IMETHODIMP HTMLMediaElement::WindowAudioCaptureChanged()
       nsCOMPtr<nsPIDOMWindow> window =
         do_QueryInterface(OwnerDoc()->GetParentObject());
       uint64_t id = window->WindowID();
-      MediaStreamGraph* msg = MediaStreamGraph::GetInstance();
+      MediaStreamGraph* msg =
+        MediaStreamGraph::GetInstance(MediaStreamGraph::AUDIO_THREAD_DRIVER,
+                                      AudioChannel::Normal);
 
       if (!mPlaybackStream) {
         nsRefPtr<DOMMediaStream> stream = CaptureStreamInternal(false, msg);