[Media Router] Add a supports_web_ui_controller attribute to MediaRoute

chrome/renderer/resources/extensions/media_router_bindings.js

 // 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.
 
 var mediaRouter;
 
 define('media_router_bindings', [
     'chrome/common/media_router/mojo/media_controller.mojom',
     'chrome/common/media_router/mojo/media_router.mojom',
     'chrome/common/media_router/mojo/media_status.mojom',
@@ skipping 67 matching lines @@
     return new mediaRouterMojom.MediaRoute({
       'media_route_id': route.id,
       'media_source': route.mediaSource,
       'media_sink_id': route.sinkId,
       'description': route.description,
       'icon_url': route.iconUrl,
       'is_local': route.isLocal,
       'custom_controller_path': route.customControllerPath,
       // Begin newly added properties, followed by the milestone they were
       // added.  The guard should be safe to remove N+2 milestones later.
-      'for_display': route.forDisplay, // M47
-      'is_incognito': !!route.offTheRecord,  // M50
-      'is_offscreen_presentation': !!route.isOffscreenPresentation // M56
+      'for_display': route.forDisplay,                               // M47
+      'is_incognito': !!route.offTheRecord,                          // M50
+      'is_offscreen_presentation': !!route.isOffscreenPresentation,  // M56
+      'supports_media_route_controller':
+          !!route.supportsMediaRouteController  // M61
     });
   }
 
   /**
    * Converts a route message to a RouteMessage Mojo object.
    * @param {!RouteMessage} message
    * @return {!mediaRouterMojom.RouteMessage} A Mojo RouteMessage object.
    */
   function messageToMojo_(message) {
     if ("string" == typeof message.message) {
@@ skipping 823 matching lines @@
     return this.handlers_
         .createMediaRouteController(routeId, controllerRequest, observer)
         .then(() => ({success: true}), e => ({success: false}));
   };
 
   mediaRouter = new MediaRouter(new mediaRouterMojom.MediaRouterPtr(
       frameInterfaces.getInterface(mediaRouterMojom.MediaRouter.name)));
 
   return mediaRouter;
 });