Make RendererMediaPlayerManager a RenderFrameObserver.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index a4f988db475f838a0c5e5fb4706be394af886bdb..ff702c15eba39bb36c0e0bc8cf3061e8890ab581 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -112,6 +112,11 @@ class CONTENT_EXPORT RenderWidget
   void RegisterSwappedOutChildFrame(RenderFrameImpl* frame);
   void UnregisterSwappedOutChildFrame(RenderFrameImpl* frame);
 
+#if defined(VIDEO_HOLE)
+  void RegisterVideoHoleFrame(RenderFrameImpl* frame);
+  void UnregisterVideoHoleFrame(RenderFrameImpl* frame);
+#endif  // defined(VIDEO_HOLE)
+
   // IPC::Listener
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
@@ -689,9 +694,12 @@ class CONTENT_EXPORT RenderWidget
 
   scoped_ptr<ResizingModeSelector> resizing_mode_selector_;
 
-  // A list of swapped out RenderFrames that need to be notified
+  // Lists of swapped out RenderFrames that need to be notified
   // of compositing-related events (e.g. DidCommitCompositorFrame).
   ObserverList<RenderFrameImpl> swapped_out_frames_;
+#if defined(VIDEO_HOLE)
+  ObserverList<RenderFrameImpl> video_hole_frames_;
+#endif  // defined(VIDEO_HOLE)
 
   ui::MenuSourceType context_menu_source_type_;
   gfx::Point touch_editing_context_menu_location_;