Media Remoting: Add mojo interfaces between browser and extension.

chrome/browser/media/router/media_router_base.h

Index: chrome/browser/media/router/media_router_base.h
diff --git a/chrome/browser/media/router/media_router_base.h b/chrome/browser/media/router/media_router_base.h
index c482662b671eb500db9b5d978ab1ab34a18d7fda..f9412461fc8e2dc5fb32b8c61e6bb9c078f6fe03 100644
--- a/chrome/browser/media/router/media_router_base.h
+++ b/chrome/browser/media/router/media_router_base.h
@@ -37,6 +37,12 @@ class MediaRouterBase : public MediaRouter {
   scoped_refptr<MediaRouteController> GetRouteController(
       const MediaRoute::Id& route_id) override;
 
+  void RegisterRemotingSource(int32_t tab_id,
+                              CastRemotingConnector* remoting_source) override;
+  void UnRegisterRemotingSource(
+      int32_t tab_id,
+      CastRemotingConnector* remoting_source) override;
+
  protected:
   FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest,
                            PresentationConnectionStateChangedCallback);