Typecheck JS files for chrome://extensions

ui/webui/resources/js/cr/ui/list_item.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('cr.ui', function() {
 
   /**
    * Creates a new list item element.
    * @param {string} opt_label The text label for the item.
    * @constructor
@@ skipping 31 matching lines @@
     /**
      * Called when the selection state of this element changes.
      */
     selectionChanged: function() {
     },
   };
 
   /**
    * Whether the item is selected. Setting this does not update the underlying
    * selection model. This is only used for display purpose.
-   * @type {boolean}
    */
   cr.defineProperty(ListItem, 'selected', cr.PropertyKind.BOOL_ATTR,
                     function() {
                       this.selectionChanged();
                     });
 
   /**
    * Whether the item is the lead in a selection. Setting this does not update
    * the underlying selection model. This is only used for display purpose.
-   * @type {boolean}
    */
   cr.defineProperty(ListItem, 'lead', cr.PropertyKind.BOOL_ATTR);
 
   /**
    * This item's index in the containing list.
-   * @type {number}
+   * type {number}
    */
   cr.defineProperty(ListItem, 'listIndex');
 
   return {
     ListItem: ListItem
   };
 });