Implemented end-of-stream callback for media::PipelineImpl.

media/filters/audio_renderer_base.h

Index: media/filters/audio_renderer_base.h
diff --git a/media/filters/audio_renderer_base.h b/media/filters/audio_renderer_base.h
index da40339cbb27b903637184439e743877619a8e29..07b62e40b599574fb1054b045d37ae35b752d14c 100644
--- a/media/filters/audio_renderer_base.h
+++ b/media/filters/audio_renderer_base.h
@@ -39,6 +39,7 @@ class AudioRendererBase : public AudioRenderer {
 
   // AudioRenderer implementation.
   virtual void Initialize(AudioDecoder* decoder, FilterCallback* callback);
+  virtual bool HasEnded();
 
  protected:
   // Only allow a factory to create this class.
@@ -115,6 +116,10 @@ class AudioRendererBase : public AudioRenderer {
   };
   State state_;
 
+  // Keeps track of whether we received and rendered the end of stream buffer.
+  bool recieved_end_of_stream_;
+  bool rendered_end_of_stream_;
+
   // Keeps track of our pending reads.  We *must* have no pending reads before
   // executing the pause callback, otherwise we breach the contract that all
   // filters are idling.