ntp4: fix app load/unload race condition

chrome/browser/resources/ntp4/apps_page.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.
 
 cr.define('ntp4', function() {
   'use strict';
 
   var localStrings = new LocalStrings;
 
   var APP_LAUNCH = {
@@ skipping 212 matching lines @@
         return self.contextMenu;
       });
       appContents.addEventListener('contextmenu', cr.ui.contextMenuHandler);
 
       this.isStore_ = this.appData_.is_webstore;
       if (this.isStore_)
         this.createAppsPromoExtras_();
     },
 
     /**
+     * Removes the app tile from the page. Should be called after the app has
+     * been uninstalled.
+     */
+    remove: function() {
+      // Unset the ID immediately, because the app is already gone. But leave
+      // the tile on the page as it animates out.
+      this.id = '';
+      var tile = findAncestorByClass(this, 'tile');
+      tile.doRemove();
+    },
+
+    /**
      * Creates the apps-promo section of the app (should only be called for the
      * webstore app).
      * @private
      */
     createAppsPromoExtras_: function() {
       this.classList.add('webstore');
 
       this.appsPromoExtras_ = $('apps-promo-extras-template').cloneNode(true);
       this.appsPromoExtras_.id = '';
       this.appsPromoHeading_ =
@@ skipping 289 matching lines @@
     var store = document.querySelector('.webstore');
     if (store)
       store.setAppsPromoData(data);
   };
 
   return {
     APP_LAUNCH: APP_LAUNCH,
     AppsPage: AppsPage,
   };
 });