preparation for recycling buffer, patch 2

media/filters/omx_video_decoder.h

Index: media/filters/omx_video_decoder.h
diff --git a/media/filters/omx_video_decoder.h b/media/filters/omx_video_decoder.h
index 5f747ada6f13d7d651700a22a1ba1f1e42d8646b..7699514331f7f5a09a2a8b06e405ea051de98926 100644
--- a/media/filters/omx_video_decoder.h
+++ b/media/filters/omx_video_decoder.h
@@ -30,8 +30,10 @@ class OmxVideoDecoder : public VideoDecoder {
   virtual void Initialize(DemuxerStream* stream, FilterCallback* callback);
   virtual void Stop(FilterCallback* callback);
   virtual void Pause(FilterCallback* callback);
+  virtual void Flush(FilterCallback* callback);
   virtual void Seek(base::TimeDelta time, FilterCallback* callback);
   virtual void FillThisBuffer(scoped_refptr<VideoFrame> frame);
+  virtual bool ProvidesBuffer();
   virtual const MediaFormat& media_format() { return media_format_; }
 
  private:
@@ -47,6 +49,7 @@ class OmxVideoDecoder : public VideoDecoder {
 
   void StopCompleteTask(FilterCallback* callback);
   void PauseCompleteTask(FilterCallback* callback);
+  void FlushCompleteTask(FilterCallback* callback);
   void SeekCompleteTask(FilterCallback* callback);
 
   // TODO(hclam): This is very ugly that we keep reference instead of