Connect the new video rendering path to the compositor.

media/base/video_renderer_sink.h

Index: media/base/video_renderer_sink.h
diff --git a/media/base/video_renderer_sink.h b/media/base/video_renderer_sink.h
index a2852ffcae575e6e2008fa6503ef79a4db541893..3f89856ea35a1419bd9e4ddf125dfc9ad50d529b 100644
--- a/media/base/video_renderer_sink.h
+++ b/media/base/video_renderer_sink.h
@@ -56,6 +56,10 @@ class MEDIA_EXPORT VideoRendererSink {
   virtual void PaintFrameUsingOldRenderingPath(
       const scoped_refptr<VideoFrame>& frame) = 0;
 
+  // TODO(dalecurtis): We may need OnSizeChanged() and OnOpacityChanged()
+  // methods on this interface if background rendering is handled inside of
+  // the media layer instead of by VideoFrameCompositor.
+
   virtual ~VideoRendererSink() {}
 };