Move bulk of media::AudioRendererImpl::Render() logic to media thread.

media/filters/audio_renderer_impl.h

Index: media/filters/audio_renderer_impl.h
diff --git a/media/filters/audio_renderer_impl.h b/media/filters/audio_renderer_impl.h
index 2e29a9e82110adce8bccd546adcb3992a1323247..c3c00fba9a0152f230dacf9661195e0edbd8945a 100644
--- a/media/filters/audio_renderer_impl.h
+++ b/media/filters/audio_renderer_impl.h
@@ -153,13 +153,24 @@ class MEDIA_EXPORT AudioRendererImpl
                      int audio_delay_milliseconds) OVERRIDE;
   virtual void OnRenderError() OVERRIDE;
 
+  // Contains result of the last call to Render(). Used to update |audio_clock_|
+  // and changes in buffering state.
+  struct RenderResult {
+    RenderResult();
+
+    int requested_frames;
+    int delay_frames;
+    int frames_written;
+    float playback_rate;
+    base::TimeDelta endpoint_timestamp;
+  };
+  void DidRender(RenderResult result);

[DaleCurtis, 2014/07/10 23:37:00]

const&

+
   // Helper methods that schedule an asynchronous read from the decoder as long
   // as there isn't a pending read.
   //
   // Must be called on |task_runner_|.
-  void AttemptRead();
   void AttemptRead_Locked();
-  bool CanRead_Locked();
   void ChangeState_Locked(State new_state);
 
   // Returns true if the data in the buffer is all before |start_timestamp_|.
@@ -188,7 +199,7 @@ class MEDIA_EXPORT AudioRendererImpl
   void OnConfigChange();
 
   // Updates |buffering_state_| and fires |buffering_state_cb_|.
-  void SetBufferingState_Locked(BufferingState buffering_state);
+  void SetBufferingState(BufferingState buffering_state);
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;