MD Bookmarks: Always select targeted item during doubleclick

chrome/browser/resources/md_bookmarks/item.js

 // Copyright 2016 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.
 
 Polymer({
   is: 'bookmarks-item',
 
   behaviors: [
     bookmarks.MouseFocusBehavior,
     bookmarks.StoreClient,
@@ skipping 130 matching lines @@
     }
     e.stopPropagation();
     e.preventDefault();
   },
 
   /**
    * @param {MouseEvent} e
    * @private
    */
   onDblClick_: function(e) {
+    if (!this.isSelectedItem_)
+      this.selectThisItem_();
+
     var commandManager = bookmarks.CommandManager.getInstance();
     var itemSet = this.getState().selection.items;
     if (commandManager.canExecute(Command.OPEN, itemSet))
       commandManager.handle(Command.OPEN, itemSet);
   },
 
   /**
    * @param {string} url
    * @private
    */
   updateFavicon_: function(url) {
     this.$.icon.style.backgroundImage = cr.icon.getFavicon(url);
   },
 });