Split OptionsPage into Page and PageManager

chrome/browser/resources/options/options_focus_manager.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 FocusManager = cr.ui.FocusManager;
-  var OptionsPage = options.OptionsPage;
+  var PageManager = cr.ui.pageManager.PageManager;
 
   function OptionsFocusManager() {
   }
 
   cr.addSingletonGetter(OptionsFocusManager);
 
   OptionsFocusManager.prototype = {
     __proto__: FocusManager.prototype,
 
     /** @override */
     getFocusParent: function() {
-      var topPage = OptionsPage.getTopmostVisiblePage().pageDiv;
+      var topPage = PageManager.getTopmostVisiblePage().pageDiv;
 
       // The default page and search page include a search field that is a
       // sibling of the rest of the page instead of a child. Thus, use the
       // parent node to allow the search field to receive focus.
       if (topPage.parentNode.id == 'page-container')
         return topPage.parentNode;
 
       return topPage;
     },
   };
 
   return {
     OptionsFocusManager: OptionsFocusManager,
   };
 });