Add video-rendering to mojo media pipeline.

media/renderers/video_renderer_impl.h

Index: media/renderers/video_renderer_impl.h
diff --git a/media/renderers/video_renderer_impl.h b/media/renderers/video_renderer_impl.h
index 0af253f737d92c66c5afe2d4c7f486de21512db0..e181d4a0adfc92f35785f4e3e1e7930a78b1134d 100644
--- a/media/renderers/video_renderer_impl.h
+++ b/media/renderers/video_renderer_impl.h
@@ -68,6 +68,7 @@ class MEDIA_EXPORT VideoRendererImpl
                   CdmContext* cdm_context,
                   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 TimeSource::WallClockTimeCB& wall_clock_time_cb,
@@ -233,6 +234,7 @@ class MEDIA_EXPORT VideoRendererImpl
   PipelineStatusCB init_cb_;
   StatisticsCB statistics_cb_;
   BufferingStateCB buffering_state_cb_;
+  NaturalSizeChangedCB natural_size_changed_cb_;
   base::Closure ended_cb_;
   PipelineStatusCB error_cb_;
   TimeSource::WallClockTimeCB wall_clock_time_cb_;