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

media/base/time_source.h

Index: media/base/time_source.h
diff --git a/media/base/time_source.h b/media/base/time_source.h
index 8ad364b20a2dda21d97d087a93f878bc0bef16e1..2c5a72028e9fe3b27dc7f7c87f74fb20feafb65c 100644
--- a/media/base/time_source.h
+++ b/media/base/time_source.h
@@ -34,23 +34,7 @@
   virtual void SetMediaTime(base::TimeDelta time) = 0;
 
   // Returns the current media time.
-  //
-  // Values returned are intended for informational purposes, such as displaying
-  // UI with the current minute and second count. While it is guaranteed values
-  // will never go backwards, the frequency at which they update may be low.
   virtual base::TimeDelta CurrentMediaTime() = 0;
-
-  // Returns the current media time for use with synchronizing video.
-  //
-  // Differences from CurrentMediaTime():
-  //   - Values returned update at a much higher frequency (e.g., suitable for
-  //     playback of 60 FPS content).
-  //   - As a result, values may go slightly backwards depending on the
-  //     implementation (e.g., uses interpolation).
-  //
-  // TODO(scherkus): Replace with a method that returns wall clock time for a
-  // given media time for use with VideoFrameScheduler http://crbug.com/110814
-  virtual base::TimeDelta CurrentMediaTimeForSyncingVideo() = 0;
 };
 
 }  // namespace media