Bookmark Manager: Don't show context menu button for editing item

chrome/browser/resources/bookmark_manager/js/bmm/bookmark_list.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.
 
 // TODO(arv): Now that this is driven by a data model, implement a data model
 //            that handles the loading and the events from the bookmark backend.
 
 cr.define('bmm', function() {
   var List = cr.ui.List;
   var ListItem = cr.ui.ListItem;
@@ skipping 147 matching lines @@
      * @private
      * @param {!Event} e The mouseover event object.
      */
     handleMouseOver_: function(e) {
       var el = e.target;
       while (el && el.parentNode != this) {
         el = el.parentNode;
       }
 
       if (el && el.parentNode == this &&
+          !el.editing &&
           !(el.lastChild instanceof ContextMenuButton)) {
         el.appendChild(new ContextMenuButton);
       }
     },
 
     /**
      * Dispatches an urlClicked event which is used to open URLs in new
      * tabs etc.
      * @private
      * @param {string} url The URL that was clicked.
@@ skipping 388 matching lines @@
         }
       }
     }
   };
 
   return {
     BookmarkList: BookmarkList,
     list: list
   };
 });