Add a disabled property to DOMUI lists

chrome/browser/resources/options/browser_options.js

 // Copyright (c) 2010 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.
 
 cr.define('options', function() {
   const OptionsPage = options.OptionsPage;
   const ArrayDataModel = cr.ui.ArrayDataModel;
   const ListSelectionModel = cr.ui.ListSelectionModel;
 
   //
@@ skipping 330 matching lines @@
                 !this.homepage_is_newtabpage_pref_.managed));
     },
 
     /**
      * Sets the enabled state of the custom startup page list controls
      * based on the current startup radio button selection.
      * @private
      */
     updateCustomStartupPageControlStates_: function() {
       var disable = !this.shouldEnableCustomStartupPageControls_();
+      $('startupPages').disabled = disable;
       $('startupAddButton').disabled = disable;
       $('startupUseCurrentButton').disabled = disable;
       this.updateRemoveButtonState_();
     },
 
     /**
      * Sets the enabled state of the startup page Remove button based on
      * the current selection in the startup pages list.
      * @private
      */
@@ skipping 55 matching lines @@
   BrowserOptions.addStartupPage = function(url) {
     BrowserOptions.getInstance().addStartupPage_(url);
   };
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 
 });