[Media Router] Add CastMediaSinkService

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 a6f1c3f0eb856cac470066f15f088326b19c027e..1f8f1c7e92a4b30ec25a565b8a3f16effd5b2b11 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_impl.h
+++ b/chrome/browser/media/router/mojo/media_router_mojo_impl.h
@@ -45,6 +45,7 @@ class Extension;
 namespace media_router {
 
 enum class MediaRouteProviderWakeReason;
+class CastMediaSinkService;
 class DialMediaSinkServiceProxy;
 
 // MediaRouter implementation that delegates calls to the component extension.
@@ -477,6 +478,9 @@ class MediaRouterMojoImpl : public MediaRouterBase,
   // Media sink service for DIAL devices.
   scoped_refptr<DialMediaSinkServiceProxy> dial_media_sink_service_proxy_;
 
+  // Media sink service for CAST devices.
+  scoped_refptr<CastMediaSinkService> cast_media_sink_service_;
+
   content::BrowserContext* const context_;
 
 #if defined(OS_WIN)