[MD Bookmarks] Add edit folder.

chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.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.
 
 /**
  * @fileoverview Test suite for the Material Design bookmarks page.
  */
 var ROOT_PATH = '../../../../../';
 
 GEN_INCLUDE(
@@ skipping 49 matching lines @@
   __proto__: MaterialBookmarksBrowserTest.prototype,
 
   extraLibraries: MaterialBookmarksBrowserTest.prototype.extraLibraries.concat([
     'item_test.js',
   ]),
 };
 
 TEST_F('MaterialBookmarksItemTest', 'All', function() {
   mocha.run();
 });
+
+function MaterialBookmarksListTest() {}
+
+MaterialBookmarksListTest.prototype = {
+  __proto__: MaterialBookmarksBrowserTest.prototype,
+
+  extraLibraries: MaterialBookmarksBrowserTest.prototype.extraLibraries.concat([
+    'list_test.js',
+  ]),
+};
+
+TEST_F('MaterialBookmarksListTest', 'All', function() {
+  mocha.run();
+});