Added separate tabs for apps / extensions in dev_tools app.

chrome/browser/resources/apps_debugger/js/items.js

 // Copyright (c) 2012 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('apps_dev_tool', function() {
   'use strict';
 
   /**
    * AppsDevTool constructor.
    * @constructor
    * @extends {HTMLDivElement}
    */
   function AppsDevTool() {}
 
   AppsDevTool.prototype = {
     __proto__: HTMLDivElement.prototype,
 
     /**
      * Perform initial setup.
      */
     initialize: function() {
+      cr.ui.decorate('tabbox', cr.ui.TabBox);
+
       // Set up the three buttons (load unpacked, pack and update).
       $('load-unpacked').addEventListener('click',
           this.handleLoadUnpackedItem_.bind(this));
       $('pack-item').addEventListener('click',
           this.handlePackItem_.bind(this));
       $('update-items-now').addEventListener('click',
           this.handleUpdateItemNow_.bind(this));
       var packItemOverlay =
           apps_dev_tool.PackItemOverlay.getInstance().initializePage();
     },
@@ skipping 58 matching lines @@
     chrome.developerPrivate.getStrings(function(strings) {
       loadTimeData.data = strings;
       i18nTemplate.process(document, loadTimeData);
     });
   };
 
   return {
     AppsDevTool: AppsDevTool,
   };
 });