Move Renderer permanent callbacks into RendererClient interface.

media/renderers/audio_renderer_impl.h

Index: media/renderers/audio_renderer_impl.h
diff --git a/media/renderers/audio_renderer_impl.h b/media/renderers/audio_renderer_impl.h
index f6d22237d08833a888c95049796d0e3fe2ef1b92..4b0d30514a5b18c9bb30eb8da80c55e64fe846b9 100644
--- a/media/renderers/audio_renderer_impl.h
+++ b/media/renderers/audio_renderer_impl.h
@@ -79,14 +79,10 @@ class MEDIA_EXPORT AudioRendererImpl
       std::vector<base::TimeTicks>* wall_clock_times) override;
 
   // AudioRenderer implementation.
-  void Initialize(DemuxerStream* stream,
-                  const PipelineStatusCB& init_cb,
+  void Initialize(RendererClient* client,
+                  DemuxerStream* stream,
                   CdmContext* cdm_context,
-                  const StatisticsCB& statistics_cb,
-                  const BufferingStateCB& buffering_state_cb,
-                  const base::Closure& ended_cb,
-                  const PipelineStatusCB& error_cb,
-                  const base::Closure& waiting_for_decryption_key_cb) override;
+                  const PipelineStatusCB& init_cb) override;
   TimeSource* GetTimeSource() override;
   void Flush(const base::Closure& callback) override;
   void StartPlaying() override;
@@ -175,6 +171,11 @@ class MEDIA_EXPORT AudioRendererImpl
   // Called upon AudioBufferStream initialization, or failure thereof (indicated
   // by the value of |success|).
   void OnAudioBufferStreamInitialized(bool succes);

[xhwang, 2016/05/09 18:13:23]

Add an empty line here since the comment above only applies to this one method.

[alokp, 2016/05/09 21:31:44]

Done.

+  void OnPlaybackError(PipelineStatus error);

[xhwang, 2016/05/09 18:13:22]

Add comment for this group, e.g. callbacks for the |client| etc.

[alokp, 2016/05/09 21:31:44]

Done.

+  void OnPlaybackEnded();
+  void OnStatisticsUpdate(const PipelineStatistics& stats);
+  void OnBufferingStateChange(BufferingState state);
+  void OnWaitingForDecryptionKey();
 
   // Used to initiate the flush operation once all pending reads have
   // completed.
@@ -215,12 +216,10 @@ class MEDIA_EXPORT AudioRendererImpl
   // Cached copy of hardware params from |hardware_config_|.
   AudioParameters audio_parameters_;
 
-  // Callbacks provided during Initialize().
+  RendererClient* client_;
+
+  // Callback provided during Initialize().
   PipelineStatusCB init_cb_;
-  BufferingStateCB buffering_state_cb_;
-  base::Closure ended_cb_;
-  PipelineStatusCB error_cb_;
-  StatisticsCB statistics_cb_;
 
   // Callback provided to Flush().
   base::Closure flush_cb_;