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

media/base/audio_renderer.h

Index: media/base/audio_renderer.h
diff --git a/media/base/audio_renderer.h b/media/base/audio_renderer.h
index 733daa65d7a53e076ad613b8b5977f56c2e8b934..3e7131c683b9c0ba55853b66fcda09a401090cf8 100644
--- a/media/base/audio_renderer.h
+++ b/media/base/audio_renderer.h
@@ -18,6 +18,10 @@
 
 class MEDIA_EXPORT AudioRenderer {
  public:
+  // First parameter is the current time that has been rendered.
+  // Second parameter is the maximum time value that the clock cannot exceed.
+  typedef base::Callback<void(base::TimeDelta, base::TimeDelta)> TimeCB;
+
   AudioRenderer();
 
   // Stop all operations and fire all pending callbacks.
@@ -28,6 +32,8 @@
   //
   // |statistics_cb| is executed periodically with audio rendering stats.
   //
+  // |time_cb| is executed whenever time has advanced by way of audio rendering.
+  //
   // |buffering_state_cb| is executed when audio rendering has either run out of
   // data or has enough data to continue playback.
   //
@@ -37,6 +43,7 @@
   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) = 0;