MD Bookmarks: Add 'show in folder' command to search result context menu

chrome/browser/resources/md_bookmarks/folder_node.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-folder-node',
 
   behaviors: [
     bookmarks.MouseFocusBehavior,
     bookmarks.StoreClient,
@@ skipping 265 matching lines @@
   },
 
   /**
    * @param {!Event} e
    * @private
    */
   onContextMenu_: function(e) {
     e.preventDefault();
     this.selectFolder_();
     bookmarks.CommandManager.getInstance().openCommandMenuAtPosition(
-        e.clientX, e.clientY, new Set([this.itemId]));
+        e.clientX, e.clientY, MenuSource.TREE, new Set([this.itemId]));
   },
 
   /**
    * @private
    * @return {!Array<!BookmarksFolderNodeElement>}
    */
   getChildFolderNodes_: function() {
     return Array.from(this.root.querySelectorAll('bookmarks-folder-node'));
   },
 
@@ skipping 81 matching lines @@
    * @param {boolean} isClosed
    * @private
    */
   updateAriaExpanded_: function(hasChildFolder, isClosed) {
     if (hasChildFolder)
       this.getFocusTarget().setAttribute('aria-expanded', String(!isClosed));
     else
       this.getFocusTarget().removeAttribute('aria-expanded');
   },
 });