Settings: manage location.hash explicitly on a Page.

chrome/browser/resources/help/help.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.
 
 <include src="../uber/uber_page_manager_observer.js">
 <include src="../uber/uber_utils.js">
 
 (function() {
   var HelpPage = help.HelpPage;
   var PageManager = cr.ui.pageManager.PageManager;
@@ skipping 29 matching lines @@
   window.onbeforeunload = function() {
     PageManager.willClose();
   };
 
   /**
    * Listener for the |popstate| event.
    * @param {Event} e The |popstate| event.
    */
   window.onpopstate = function(e) {
     var pageName = PageManager.getPageNameFromPath();
-    PageManager.setState(pageName, e.state);
+    PageManager.setState(pageName, location.hash, e.state);
   };
 })();