Replace Pipeline::kEnded state and HasEnded() methods with renderer-specific bools.

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 ad124b8c96912360b8ff999e7b5eaee0bcb575b3..b3a33159261e70b16fc11d4e45ffba4205fabd86 100644
--- a/media/base/audio_renderer.h
+++ b/media/base/audio_renderer.h
@@ -72,9 +72,6 @@ class MEDIA_EXPORT AudioRenderer
   // Updates the current playback rate.
   virtual void SetPlaybackRate(float playback_rate) = 0;
 
-  // Returns true if all audio data has been played back by the audio device.
-  virtual bool HasEnded() = 0;
-
   // Sets the output volume.
   virtual void SetVolume(float volume) = 0;