Migrate startup URLs pref.

chrome/browser/resources/options/browser_options.js

 // Copyright (c) 2012 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() {
   var OptionsPage = options.OptionsPage;
   var ArrayDataModel = cr.ui.ArrayDataModel;
   var RepeatingButton = cr.ui.RepeatingButton;
 
   //
@@ skipping 88 matching lines @@
       if (cr.isChromeOS) {
         options.network.NetworkList.decorate($('network-list'));
         options.network.NetworkList.refreshNetworkData(
             loadTimeData.getValue('networkData'));
       }
 
       // On Startup section.
       Preferences.getInstance().addEventListener('session.restore_on_startup',
           this.onRestoreOnStartupChanged_.bind(this));
       Preferences.getInstance().addEventListener(
-          'session.urls_to_restore_on_startup',
+          'session.startup_urls',
           function(event) {
             $('startup-set-pages').disabled = event.value.disabled;
           });
 
       $('startup-set-pages').onclick = function() {
         OptionsPage.navigateToPage('startup');
       };
 
       // Appearance section.
       Preferences.getInstance().addEventListener('browser.show_home_button',
@@ skipping 1426 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });