Switch to using media::TimeSource inside media::RendererImpl.

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 086cf99b116402069c77ecd82856492770841b68..1e79a5a26be5e915973648baaab1c7277d6da6bb 100644
--- a/media/filters/audio_renderer_impl.h
+++ b/media/filters/audio_renderer_impl.h
@@ -73,12 +73,12 @@ class MEDIA_EXPORT AudioRendererImpl
   virtual void SetPlaybackRate(float rate) OVERRIDE;
   virtual void SetMediaTime(base::TimeDelta time) OVERRIDE;
   virtual base::TimeDelta CurrentMediaTime() OVERRIDE;
+  virtual base::TimeDelta ApproximateCurrentMediaTime() OVERRIDE;
 
   // AudioRenderer implementation.
   virtual void Initialize(DemuxerStream* stream,
                           const PipelineStatusCB& init_cb,
                           const StatisticsCB& statistics_cb,
-                          const TimeCB& time_cb,
                           const BufferingStateCB& buffering_state_cb,
                           const base::Closure& ended_cb,
                           const PipelineStatusCB& error_cb) OVERRIDE;
@@ -213,7 +213,6 @@ class MEDIA_EXPORT AudioRendererImpl
 
   // Callbacks provided during Initialize().
   PipelineStatusCB init_cb_;
-  TimeCB time_cb_;
   BufferingStateCB buffering_state_cb_;
   base::Closure ended_cb_;
   PipelineStatusCB error_cb_;
@@ -250,7 +249,7 @@ class MEDIA_EXPORT AudioRendererImpl
 
   base::TimeDelta start_timestamp_;
   base::TimeDelta ended_timestamp_;
-  base::TimeDelta last_timestamp_update_;
+  base::TimeTicks last_render_ticks_;

[xhwang, 2014/09/08 22:56:06]

As discussed offline, it would be nicer to add some comments about these
variables.

[scherkus (not reviewing), 2014/09/09 18:17:18]

Done.

 
   // End variables which must be accessed under |lock_|. ----------------------