Fix JavaScript errors in options2

chrome/browser/resources/options2/inline_editable_list.js

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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('options', function() {
   const DeletableItem = options.DeletableItem;
   const DeletableItemList = options.DeletableItemList;
 
   /**
    * Creates a new list item with support for inline editing.
    * @constructor
@@ skipping 380 matching lines @@
       if (leadItem) {
         if (e.newValue)
           leadItem.updateEditState();
         else
           leadItem.editing = false;
       }
     },
 
     /**
      * May be overridden by subclasses to disable focusing the placeholder.
-     * @return true if the placeholder element should be focused on edit commit.
+     * @return {boolean} True if the placeholder element should be focused on
+     *     edit commit.
      */
     shouldFocusPlaceholder: function() {
       return true;
     },
   };
 
   // Export
   return {
     InlineEditableItem: InlineEditableItem,
     InlineEditableItemList: InlineEditableItemList,
   };
 });