Integrate About page into Settings for Chrome OS settings in a window.

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">
 
-var ChannelChangePage = help.ChannelChangePage;
-var HelpPage = help.HelpPage;
-var PageManager = cr.ui.pageManager.PageManager;
+(function() {
+  var HelpPage = help.HelpPage;
+  var PageManager = cr.ui.pageManager.PageManager;
 
-/**
- * DOMContentLoaded handler, sets up the page.
- */
-function load() {
-  PageManager.register(HelpPage.getInstance());
+  /**
+   * DOMContentLoaded handler, sets up the page.
+   */
+  function load() {
+    PageManager.register(HelpPage.getInstance());
 
-  if (cr.isChromeOS) {
-    PageManager.registerOverlay(ChannelChangePage.getInstance(),
-                                HelpPage.getInstance());
+    if (cr.isChromeOS) {
+      PageManager.registerOverlay(help.ChannelChangePage.getInstance(),
+                                  HelpPage.getInstance());
+    }
+    cr.ui.FocusManager.disableMouseFocusOnButtons();
+    PageManager.addObserver(new uber.PageManagerObserver());
+    PageManager.initialize(HelpPage.getInstance());
+    uber.onContentFrameLoaded();
+
+    var pageName = PageManager.getPageNameFromPath();
+    // Still update history so that chrome://help/nonexistant redirects
+    // appropriately to chrome://help/. If the URL matches, updateHistory
+    // will avoid adding the extra state.
+    var updateHistory = true;
+    PageManager.showPageByName(pageName, updateHistory, {replaceState: true});
   }
-  cr.ui.FocusManager.disableMouseFocusOnButtons();
-  PageManager.addObserver(new uber.PageManagerObserver());
-  PageManager.initialize(HelpPage.getInstance());
-  uber.onContentFrameLoaded();
 
-  var pageName = PageManager.getPageNameFromPath();
-  // Still update history so that chrome://help/nonexistant redirects
-  // appropriately to chrome://help/. If the URL matches, updateHistory
-  // will avoid adding the extra state.
-  var updateHistory = true;
-  PageManager.showPageByName(pageName, updateHistory, {replaceState: true});
-}
+  document.addEventListener('DOMContentLoaded', load);
 
-document.addEventListener('DOMContentLoaded', load);
+  /**
+   * Listener for the |beforeunload| event.
+   */
+  window.onbeforeunload = function() {
+    PageManager.willClose();
+  };
 
-/**
- * Listener for the |beforeunload| event.
- */
-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);
-};
+  /**
+   * Listener for the |popstate| event.
+   * @param {Event} e The |popstate| event.
+   */
+  window.onpopstate = function(e) {
+    var pageName = PageManager.getPageNameFromPath();
+    PageManager.setState(pageName, e.state);
+  };
+})();