[Media Router] Adds return value to mojo MediaRouteProvider::TerminateRoute.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 288 matching lines @@
       const mojo::String& route_id,
       interfaces::MediaRouter::PresentationConnectionState state) override;
   void OnPresentationConnectionClosed(
       const mojo::String& route_id,
       interfaces::MediaRouter::PresentationConnectionCloseReason reason,
       const mojo::String& message) override;
   void OnRouteMessagesReceived(
       const mojo::String& route_id,
       mojo::Array<interfaces::RouteMessagePtr> messages) override;
 
+  // Result callback when Mojo terminateRoute is invoked.  |route_id| is bound
+  // to the ID of the route that was terminated.
+  void OnTerminateRouteResult(const MediaRoute::Id& route_id,
+                              mojo::String error_text,
+                              interfaces::RouteRequestResultCode result_code);
+
   // Converts the callback result of calling Mojo CreateRoute()/JoinRoute()
   // into a local callback.
   void RouteResponseReceived(
       const std::string& presentation_id,
       bool off_the_record,
       const std::vector<MediaRouteResponseCallback>& callbacks,
       interfaces::MediaRoutePtr media_route,
       mojo::String error_text,
       interfaces::RouteRequestResultCode result_code);
 
@@ skipping 108 matching lines @@
 #endif
 
   base::WeakPtrFactory<MediaRouterMojoImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterMojoImpl);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_