Fix perf and paint issues with VRI::PaintSingleFrame.

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 bd3e15102b40e9800c7cd492c7b5159dc2d8e451..3ca8cc57d4688b8a20c3675eb6d5d7bb68547368 100644
--- a/media/renderers/video_renderer_impl.h
+++ b/media/renderers/video_renderer_impl.h
@@ -286,6 +286,9 @@ class MEDIA_EXPORT VideoRendererImpl
   gfx::Size last_frame_natural_size_;
   bool last_frame_opaque_;
 
+  // Indicates if we've painted the first valid frame after StartPlayingFrom().
+  bool painted_first_frame_;
+
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoRendererImpl> weak_factory_;