Media Remoting: Add mojo interfaces between browser and extension.

chrome/browser/media/router/mojo/media_router_mojo_impl.h

Index: chrome/browser/media/router/mojo/media_router_mojo_impl.h
diff --git a/chrome/browser/media/router/mojo/media_router_mojo_impl.h b/chrome/browser/media/router/mojo/media_router_mojo_impl.h
index d1c6c00cdabf348dc77501b77c1ab34bf00674c3..4ce3a61ddb6ba2a8328d37f47c822f5e8d96b4c5 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_impl.h
+++ b/chrome/browser/media/router/mojo/media_router_mojo_impl.h
@@ -248,6 +248,10 @@ class MediaRouterMojoImpl : public MediaRouterBase,
   void UnregisterRouteMessageObserver(RouteMessageObserver* observer) override;
   void DetachRouteController(const MediaRoute::Id& route_id,
                              MediaRouteController* controller) override;
+  void RegisterRemotingSource(int32_t tab_id,
+                              CastRemotingConnector* connector) override;
+  void UnRegisterRemotingSource(int32_t tab_id,
+                                CastRemotingConnector* connector) override;
 
   // Notifies |observer| of any existing cached routes, if it is still
   // registered.
@@ -342,6 +346,10 @@ class MediaRouterMojoImpl : public MediaRouterBase,
   void OnRouteMessagesReceived(
       const std::string& route_id,
       const std::vector<RouteMessage>& messages) override;
+  void OnMediaRemoterCreated(
+      int32_t tab_id,
+      media::mojom::MirrorServiceRemoterPtr remoter,
+      media::mojom::MirrorServiceRemotingSourceRequest source_request) override;
 
   // Result callback when Mojo terminateRoute is invoked.  |route_id| is bound
   // to the ID of the route that was terminated.
@@ -485,6 +493,11 @@ class MediaRouterMojoImpl : public MediaRouterBase,
   bool should_enable_mdns_discovery_ = false;
 #endif
 
+  // Stores CastRemotingConnectors that can be connected to the MediaRemoter
+  // for media remoting when OnMediaRemoterCreated() is called. The map uses the
+  // tab ID as the key.
+  std::unordered_map<int32_t, CastRemotingConnector*> remoting_sources_;
+
   base::WeakPtrFactory<MediaRouterMojoImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterMojoImpl);