Ties RenderFrameImpl VIDEO_HOLE observer to lifetime of RenderWidget.

This allows using the VIDEO_HOLE outside of Android.

R=xhwang,damienv1
BUG=392993

Review URL: https://codereview.chromium.org/375713002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282783 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index f95bb81..dfb30be7 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -638,6 +638,12 @@
   RendererCdmManager* cdm_manager_;
 #endif
 
+#if defined(VIDEO_HOLE)
+  // Whether or not this RenderFrameImpl contains a media player. Used to
+  // register as an observer for video-hole-specific events.
+  bool contains_media_player_;
+#endif
+
   // The geolocation dispatcher attached to this frame, lazily initialized.
   GeolocationDispatcher* geolocation_dispatcher_;