Add video-rendering to mojo media pipeline.

media/renderers/renderer_impl.h

Index: media/renderers/renderer_impl.h
diff --git a/media/renderers/renderer_impl.h b/media/renderers/renderer_impl.h
index fc17f6cbdf628ee1534e49890275856f156e6300..183f364784587fa4aa2369be786661a8a00e9337 100644
--- a/media/renderers/renderer_impl.h
+++ b/media/renderers/renderer_impl.h
@@ -51,6 +51,7 @@ class MEDIA_EXPORT RendererImpl : public Renderer {
                   const PipelineStatusCB& init_cb,
                   const StatisticsCB& statistics_cb,
                   const BufferingStateCB& buffering_state_cb,
+                  const NaturalSizeChangedCB& natural_size_changed_cb,
                   const base::Closure& ended_cb,
                   const PipelineStatusCB& error_cb,
                   const base::Closure& waiting_for_decryption_key_cb) final;
@@ -142,6 +143,7 @@ class MEDIA_EXPORT RendererImpl : public Renderer {
   base::Closure ended_cb_;
   PipelineStatusCB error_cb_;
   BufferingStateCB buffering_state_cb_;
+  NaturalSizeChangedCB natural_size_changed_cb_;
   base::Closure waiting_for_decryption_key_cb_;
 
   // Temporary callback used for Initialize() and Flush().