[Media Router] Show user email in header if cloud sink is present.

chrome/browser/resources/media_router/media_router.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.
 
 <include src="media_router_data.js">
 <include src="media_router_ui_interface.js">
 
 // Handles user events for the Media Router UI.
 cr.define('media_router', function() {
   'use strict';
@@ skipping 10 matching lines @@
 
   /**
    * Initializes the Media Router WebUI and requests initial media
    * router content, such as the media sink and media route lists.
    */
   function initialize() {
     media_router.browserApi.requestInitialData();
 
     container = /** @type {!MediaRouterContainerElement} */
         ($('media-router-container'));
-    media_router.ui.setContainer(container);
+
+    media_router.ui.setElements(container,
+        /** @type {!MediaRouterHeaderElement} */
+        (container.$['container-header']));
 
     container.addEventListener('acknowledge-first-run-flow',
                                onAcknowledgeFirstRunFlow);
     container.addEventListener('back-click', onNavigateToSinkList);
     container.addEventListener('cast-mode-selected', onCastModeSelected);
     container.addEventListener('close-button-click', onCloseDialogEvent);
     container.addEventListener('close-dialog', onCloseDialogEvent);
     container.addEventListener('close-route-click', onCloseRouteClick);
     container.addEventListener('create-route', onCreateRoute);
     container.addEventListener('issue-action-click', onIssueActionClick);
@@ skipping 251 matching lines @@
     var detail = event.detail;
     media_router.browserApi.reportSinkCount(detail.sinkCount);
   }
 
   return {
     initialize: initialize,
   };
 });
 
 window.addEventListener('load', media_router.initialize);