ntp4: fix app context menu z-order

chrome/browser/resources/ntp4/new_tab.js

 // Copyright (c) 2011 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.
 
 /**
  * @fileoverview New tab page
  * This is the main code for the new tab page used by touch-enabled Chrome
  * browsers.  For now this is still a prototype.
  */
 
@@ skipping 71 matching lines @@
    * something to occur until after a transition has completed.
    * @type {number}
    * @const
    */
   var DEFAULT_TRANSITION_TIME = 500;
 
   /**
    * Invoked at startup once the DOM is available to initialize the app.
    */
   function initialize() {
+    cr.enablePlatformSpecificCSSRules();
+
     // Load the current theme colors.
     themeChanged();
 
     dotList = getRequiredElement('dot-list');
     pageList = getRequiredElement('page-list');
     trash = getRequiredElement('trash');
     trash.hidden = true;
 
     document.querySelector('#notification button').onclick = function(e) {
       hideNotification();
@@ skipping 460 matching lines @@
 // TODO(estade): update the content handlers to use ntp namespace instead of
 // making these global.
 var assert = ntp4.assert;
 var getAppsCallback = ntp4.getAppsCallback;
 var appsPrefChangeCallback = ntp4.appsPrefChangeCallback;
 var themeChanged = ntp4.themeChanged;
 var recentlyClosedTabs = ntp4.setRecentlyClosedTabs;
 var setMostVisitedPages = ntp4.setMostVisitedPages;
 
 document.addEventListener('DOMContentLoaded', ntp4.initialize);