[Media Router WebUI] Add slight delay before requesting initial data for Mac.

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';
 
   /**
    * The media-router-container element. Initialized after polymer is ready.
    * @type {?MediaRouterContainerElement}
    */
   var container = null;
 
   /**
    * 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();
+    // For non-Mac platforms, request data immediately after initialization.
+    if (!cr.isMac)
+      onRequestInitialData();
 
     container = /** @type {!MediaRouterContainerElement} */
         ($('media-router-container'));
 
     media_router.ui.setElements(container,
         /** @type {!MediaRouterHeaderElement} */
         (container.$['container-header']));
 
     container.addEventListener('acknowledge-first-run-flow',
                                onAcknowledgeFirstRunFlow);
@@ skipping 10 matching lines @@
     container.addEventListener('report-filter', onFilter);
     container.addEventListener('report-initial-action', onInitialAction);
     container.addEventListener('report-initial-action-close',
                                onInitialActionClose);
     container.addEventListener('report-route-creation', onReportRouteCreation);
     container.addEventListener('report-sink-click-time',
                                onSinkClickTimeReported);
     container.addEventListener('report-sink-count', onSinkCountReported);
     container.addEventListener('report-resolved-route',
                                onReportRouteCreationOutcome);
+    container.addEventListener('request-initial-data',
+                               onRequestInitialData);
     container.addEventListener('search-sinks-and-create-route',
                                onSearchSinksAndCreateRoute);
     container.addEventListener('show-initial-state', onShowInitialState);
     container.addEventListener('sink-click', onSinkClick);
     container.addEventListener('start-casting-to-route-click',
                                onStartCastingToRouteClick);
 
     window.addEventListener('blur', onWindowBlur);
   }
 
@@ skipping 219 matching lines @@
    *   outcome - the outcome of a create route response.
    *
    */
   function onReportRouteCreationOutcome(event) {
     /** @type {{outcome: number}} */
     var detail = event.detail;
     media_router.browserApi.reportRouteCreationOutcome(detail.outcome);
   }
 
   /**
+   * Requests for initial data to load into the dialog.
+   */
+  function onRequestInitialData() {
+    media_router.browserApi.requestInitialData();
+  }
+
+  /**
    * Reports the initial state of the dialog after it is opened.
    * Called after initial data is populated.
    *
    * @param {!Event} event
    * Parameters in |event|.detail:
    *   currentView - the current dialog's current view.
    */
   function onShowInitialState(event) {
     /** @type {{currentView: string}} */
     var detail = event.detail;
@@ skipping 48 matching lines @@
   function onWindowBlur() {
     media_router.browserApi.reportBlur();
   }
 
   return {
     initialize: initialize,
   };
 });
 
 window.addEventListener('load', media_router.initialize);