MD Bookmarks: Support policies for disabling bookmark editing

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 175 matching lines @@
   mocha.run();
 });
 
 function MaterialBookmarksPolicyTest() {}
 
 MaterialBookmarksPolicyTest.prototype = {
   __proto__: MaterialBookmarksBrowserTest.prototype,
 
   testGenPreamble: function() {
     GEN('SetIncognitoAvailability(IncognitoModePrefs::DISABLED);');
+    GEN('SetCanEditBookmarks(false);');
   },
 
   extraLibraries: MaterialBookmarksBrowserTest.prototype.extraLibraries.concat([
     'policy_test.js',
   ]),
 };
 
 TEST_F('MaterialBookmarksPolicyTest', 'All', function() {
   mocha.run();
 });
@@ skipping 32 matching lines @@
   __proto__: MaterialBookmarksBrowserTest.prototype,
 
   extraLibraries: MaterialBookmarksBrowserTest.prototype.extraLibraries.concat([
     'util_test.js',
   ]),
 };
 
 TEST_F('MaterialBookmarksUtilTest', 'All', function() {
   mocha.run();
 });