Adds functionality to pack an extension / app from the 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.
 
 function $(id) {
   return document.getElementById(id);
 }
 
 var ItemsList = options.ItemsList;
 
@@ skipping 91 matching lines @@
    */
   initialize: function() {
     // 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 = extensions.PackItemOverlay.getInstance();
+    packItemOverlay.initializePage();
   },
 
   /** Handles the Load Unpacked Extension button.
    * @param {Event} e Change event.
    * @private
    */
   handleLoadUnpackedItem_: function(e) {
     chrome.developerPrivate.loadUnpacked(function(success) {
       loadItemsInfo();
     });
   },
 
   /** Handles the Pack Extension button.
    * @param {Event} e Change event.
    * @private
    */
   handlePackItem_: function(e) {
-    //TODO (grv) : implement pack item.
-    console.log('yet to be implemented...');
+    AppsDebugger.showOverlay($('packItemOverlay'));
   },
 
   /**
    * Handles the Update Extension Now Button.
    * @param {Event} e Change event.
    * @private
    */
   handleUpdateItemNow_: function(e) {
     chrome.developerPrivate.autoUpdate(function(response) {
     });
@@ skipping 17 matching lines @@
 AppsDebugger.showOverlay = function(node) {
   var currentlyShowingOverlay = AppsDebugger.getCurrentOverlay();
   if (currentlyShowingOverlay)
     currentlyShowingOverlay.classList.remove('showing');
   if (node)
     node.classList.add('showing');
   overlay.hidden = !node;
   uber.invokeMethodOnParent(node ? 'beginInterceptingEvents' :
                                    'stopInterceptingEvents');
 };