ntp4: fix app load/unload race condition

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 359 matching lines @@
 
   /**
    * Called by chrome when an existing app has been removed/uninstalled from
    * chrome.
    * @param {Object} appData A data structure full of relevant information for
    *     the app.
    */
   function appRemoved(appData) {
     var app = $(appData.id);
     assert(app, 'trying to remove an app that doesn\'t exist');
-
-    var tile = findAncestorByClass(app, 'tile');
-    tile.doRemove();
+    app.remove();
   }
 
   /**
    * Given a theme resource name, construct a URL for it.
    * @param {string} resourceName The name of the resource.
    * @return {string} A url which can be used to load the resource.
    */
   function getThemeUrl(resourceName) {
     return 'chrome://theme/' + resourceName;
   }
@@ skipping 394 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);