Media Remoting: Add RemotingController.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index b5904b226ef97ff5fef68b2a10a4ea16a8f1bea8..af266dd1cee98d22f4576085f3711000c2ea640a 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -105,6 +105,7 @@ class CdmFactory;
 class DecoderFactory;
 class MediaPermission;
 class MediaServiceProvider;
+class RemotingController;
 class RendererWebMediaPlayerDelegate;
 class SurfaceManager;
 class UrlIndex;
@@ -1048,6 +1049,12 @@ class CONTENT_EXPORT RenderFrameImpl
 
   void InitializeBlameContext(RenderFrameImpl* parent_frame);
 
+#if defined(ENABLE_MEDIA_REMOTING)
+  // Create the RemotingController to control whether to switch to/from media

[xhwang, 2016/10/05 05:27:53]

nit: Create_s_

[xjz, 2016/10/05 17:24:23]

Done.

+  // remoting from/to local playback.
+  std::unique_ptr<media::RemotingController> CreateRemotingController();
+#endif  // defined(ENABLE_MEDIA_REMOTING)
+
   // Stores the WebLocalFrame we are associated with.  This is null from the
   // constructor until BindToWebFrame is called, and it is null after
   // frameDetached is called until destruction (which is asynchronous in the