[Media Router] Custom Controls 2 - add MediaRouter::GetRouteController()

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 e2710031b7627726cd609027c47c3cd1865a6082..fdfb4c149161a1e6b7523cf904505e896f351e34 100644
--- a/chrome/browser/media/router/media_router_base.h
+++ b/chrome/browser/media/router/media_router_base.h
@@ -34,6 +34,10 @@ class MediaRouterBase : public MediaRouter {
 
   std::vector<MediaRoute> GetCurrentRoutes() const override;
 
+  scoped_refptr<MediaRouteController> GetRouteController(
+      const MediaRoute::Id& route_id) override;
+  void OnRouteControllerDestroyed(const MediaRoute::Id& route_id) override;
+
  protected:
   FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest,
                            PresentationConnectionStateChangedCallback);