Remove HasAudio(), HasVideo(), GetInitialNaturalSize() from media::Pipeline.

content/renderer/media/webmediaplayer_impl.h

Index: content/renderer/media/webmediaplayer_impl.h
diff --git a/content/renderer/media/webmediaplayer_impl.h b/content/renderer/media/webmediaplayer_impl.h
index 7f765a82c036193401f1bbcf589d95804527cb24..b7a951899be58776b28106b1797eb86b9d6d82d1 100644
--- a/content/renderer/media/webmediaplayer_impl.h
+++ b/content/renderer/media/webmediaplayer_impl.h
@@ -174,6 +174,7 @@ class WebMediaPlayerImpl
   void OnPipelineSeek(media::PipelineStatus status);
   void OnPipelineEnded();
   void OnPipelineError(media::PipelineStatus error);
+  void OnPipelineHasTrack(media::Pipeline::TrackType track);
   void OnPipelineBufferingState(
       media::Pipeline::BufferingState buffering_state);
   void OnDemuxerOpened();
@@ -269,6 +270,10 @@ class WebMediaPlayerImpl
   // The LoadType passed in the |load_type| parameter of the load() call.
   LoadType load_type_;
 
+  // Cache of available tracks for answering hasAudio() and hasVideo().
+  bool has_audio_;
+  bool has_video_;
+
   // Playback state.
   //
   // TODO(scherkus): we have these because Pipeline favours the simplicity of a