Add video-rendering to mojo media pipeline.

media/base/pipeline_impl.h

Index: media/base/pipeline_impl.h
diff --git a/media/base/pipeline_impl.h b/media/base/pipeline_impl.h
index 7a6da3a7b5115974ad31e0ddf7066c0b53b1a4b4..dfdf17163401b4530ae105f91cb79117584ae1bb 100644
--- a/media/base/pipeline_impl.h
+++ b/media/base/pipeline_impl.h
@@ -90,6 +90,7 @@ class MEDIA_EXPORT PipelineImpl : public Pipeline, public DemuxerHost {
              const PipelineStatusCB& seek_cb,
              const PipelineMetadataCB& metadata_cb,
              const BufferingStateCB& buffering_state_cb,
+             const NaturalSizeChangedCB& natural_size_changed_cb,
              const base::Closure& duration_change_cb,
              const AddTextTrackCB& add_text_track_cb,
              const base::Closure& waiting_for_decryption_key_cb) override;
@@ -232,6 +233,7 @@ class MEDIA_EXPORT PipelineImpl : public Pipeline, public DemuxerHost {
   void ReportMetadata();
 
   void BufferingStateChanged(BufferingState new_buffering_state);
+  void OnNaturalSizeChanged(const gfx::Size& size);
 
   // Task runner used to execute pipeline tasks.
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
@@ -303,6 +305,7 @@ class MEDIA_EXPORT PipelineImpl : public Pipeline, public DemuxerHost {
   PipelineStatusCB error_cb_;
   PipelineMetadataCB metadata_cb_;
   BufferingStateCB buffering_state_cb_;
+  NaturalSizeChangedCB natural_size_changed_cb_;
   base::Closure duration_change_cb_;
   AddTextTrackCB add_text_track_cb_;
   base::Closure waiting_for_decryption_key_cb_;