Moved the fake input stream's processing onto the audio worker thread.

media/audio/null_audio_sink.h

Index: media/audio/null_audio_sink.h
diff --git a/media/audio/null_audio_sink.h b/media/audio/null_audio_sink.h
index d261602c0ec788d333fa2b16ec15276e0f352fc5..1abdb996b5c0bbbd180a4f4fee6bcc0e566cba72 100644
--- a/media/audio/null_audio_sink.h
+++ b/media/audio/null_audio_sink.h
@@ -17,7 +17,7 @@ class SingleThreadTaskRunner;
 namespace media {
 class AudioBus;
 class AudioHash;
-class FakeAudioConsumer;
+class FakeAudioWorker;
 
 class MEDIA_EXPORT NullAudioSink
     : NON_EXPORTED_BASE(public AudioRendererSink) {
@@ -44,7 +44,7 @@ class MEDIA_EXPORT NullAudioSink
 
  private:
   // Task that periodically calls Render() to consume audio data.
-  void CallRender(AudioBus* audio_bus);
+  void CallRender();
 
   bool initialized_;
   bool playing_;
@@ -54,7 +54,8 @@ class MEDIA_EXPORT NullAudioSink
   scoped_ptr<AudioHash> audio_hash_;
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-  scoped_ptr<FakeAudioConsumer> fake_consumer_;
+  scoped_ptr<FakeAudioWorker> fake_worker_;
+  scoped_ptr<AudioBus> audio_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(NullAudioSink);
 };