[Media Router] Add a supports_web_ui_controller attribute to MediaRoute

chrome/browser/resources/media_router/media_router_ui_interface.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.
 
 // API invoked by the browser MediaRouterWebUIMessageHandler to communicate
 // with this UI.
 cr.define('media_router.ui', function() {
   'use strict';
 
   // The media-router-container element.
@@ skipping 102 matching lines @@
    *   sinksAndIdentity - list of sinks to be displayed and user identity.
    *   useWebUiRouteControls - whether new WebUI route controls should be used.
    *   routes - list of routes that are associated with the sinks.
    *   castModes - list of available cast modes.
    *   useTabMirroring - whether the cast mode should be set to TAB_MIRROR.
    */
   function setInitialData(data) {
     container.deviceMissingUrl = data['deviceMissingUrl'];
     container.castModeList = data['castModes'];
     this.setSinkListAndIdentity(data['sinksAndIdentity']);
-    container.useWebUiRouteControls = !!data['useWebUiRouteControls'];
     container.routeList = data['routes'];
     container.maybeShowRouteDetailsOnOpen();
     if (data['useTabMirroring'])
       container.selectCastMode(media_router.CastModeType.TAB_MIRROR);
     media_router.browserApi.onInitialDataReceived();
   }
 
   /**
    * Sets current issue to |issue|, or clears the current issue if |issue| is
    * null.
@@ skipping 78 matching lines @@
     setInitialData: setInitialData,
     setIssue: setIssue,
     setRouteControls: setRouteControls,
     setRouteList: setRouteList,
     setSinkListAndIdentity: setSinkListAndIdentity,
     updateMaxHeight: updateMaxHeight,
     updateRouteStatus: updateRouteStatus,
     userSelectedLocalMediaFile: userSelectedLocalMediaFile,
   };
 });