Make RendererMediaPlayerManager a RenderFrameObserver.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 5c82eda23832f6bf500bb5cb2975ce53e2c71cbd..30f5381d02c8a283fa94af6b3629eb85b8d6357b 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1206,6 +1206,10 @@ void RenderWidget::didBecomeReadyForAdditionalInput() {
 void RenderWidget::DidCommitCompositorFrame() {
   FOR_EACH_OBSERVER(RenderFrameImpl, swapped_out_frames_,
                     DidCommitCompositorFrame());
+#if defined(VIDEO_HOLE)
+  FOR_EACH_OBSERVER(RenderFrameImpl, video_hole_frames_,
+                    DidCommitCompositorFrame());
+#endif  // defined(VIDEO_HOLE)
 }
 
 void RenderWidget::didCommitAndDrawCompositorFrame() {
@@ -2080,4 +2084,14 @@ void RenderWidget::UnregisterSwappedOutChildFrame(RenderFrameImpl* frame) {
   swapped_out_frames_.RemoveObserver(frame);
 }
 
+#if defined(VIDEO_HOLE)
+void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
+  video_hole_frames_.AddObserver(frame);
+}
+
+void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
+  video_hole_frames_.RemoveObserver(frame);
+}
+#endif  // defined(VIDEO_HOLE)
+
 }  // namespace content