[Media Router] Add a supports_web_ui_controller attribute to MediaRoute

chrome/common/media_router/mojo/media_router_struct_traits.h

 // Copyright 2016 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_COMMON_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_STRUCT_TRAITS_H_
 #define CHROME_COMMON_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_STRUCT_TRAITS_H_
 
 #include <string>
 
 #include "chrome/common/media_router/discovery/media_sink_internal.h"
@@ skipping 367 matching lines @@
     return route.is_local();
   }
 
   static base::Optional<std::string> custom_controller_path(
       const media_router::MediaRoute& route) {
     return route.custom_controller_path().empty()
                ? base::Optional<std::string>()
                : base::make_optional(route.custom_controller_path());
   }
 
+  static bool supports_media_route_controller(
+      const media_router::MediaRoute& route) {
+    return route.supports_media_route_controller();
+  }
+
   static bool for_display(const media_router::MediaRoute& route) {
     return route.for_display();
   }
 
   static bool is_incognito(const media_router::MediaRoute& route) {
     return route.is_incognito();
   }
 
   static bool is_offscreen_presentation(const media_router::MediaRoute& route) {
     return route.is_offscreen_presentation();
@@ skipping 163 matching lines @@
         *output = media_router::RouteRequestResult::CANCELLED;
         return true;
     }
     return false;
   }
 };
 
 }  // namespace mojo
 
 #endif  // CHROME_COMMON_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_STRUCT_TRAITS_H_