Prime the landing pad for the new video rendering pipeline.

media/mojo/services/mojo_renderer_service.h

Index: media/mojo/services/mojo_renderer_service.h
diff --git a/media/mojo/services/mojo_renderer_service.h b/media/mojo/services/mojo_renderer_service.h
index 2046e9d8d19812a5608f4bc4d7f237f76a60bcc8..6003515befb6e41a129847559bc93181e7f748ec 100644
--- a/media/mojo/services/mojo_renderer_service.h
+++ b/media/mojo/services/mojo_renderer_service.h
@@ -27,6 +27,7 @@ namespace media {
 class AudioRendererSink;
 class DemuxerStreamProviderShim;
 class Renderer;
+class VideoRendererSink;
 
 // A mojo::MediaRenderer implementation that uses media::AudioRenderer to
 // decode and render audio to a sink obtained from the ApplicationConnection.
@@ -89,6 +90,7 @@ class MEDIA_EXPORT MojoRendererService
   State state_;
 
   scoped_refptr<AudioRendererSink> audio_renderer_sink_;
+  scoped_ptr<VideoRendererSink> video_renderer_sink_;

[xhwang, 2015/04/15 00:12:19]

ARS is ref-counted and VRS is not. Is there a plan to address this asymmetry?
Sorry for my asymmetriphobia :)

[DaleCurtis, 2015/04/15 00:13:56]

It'd be nice to make ARS non-ref-counted, but that's a major yak shave since
it's used all over. I don't have plans to do this. I just want to make sure we
start with the right model for VideoRendererSink :)

[xhwang, 2015/04/15 00:17:06]

Acknowledged.

   scoped_ptr<Renderer> renderer_;
   scoped_ptr<DemuxerStreamProviderShim> stream_provider_;