Add a test for checking that refreshing a page does load the same WebUI page.

chrome/test/data/webui/settings.js

 // Copyright (c) 2011 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.
 
 function testSetBooleanPrefTriggers() {
   // TODO(dtseng): make generic to click all buttons.
   var showHomeButton = $('toolbarShowHomeButton');
   assertTrue(showHomeButton != null);
   showHomeButton.click();
   showHomeButton.blur();
 }
+
+function testPageIsUnderTheHood() {
+  var pageInstance = AdvancedOptions.getInstance();
+  var topPage = OptionsPage.getTopmostVisiblePage();
+  var expectedTitle = pageInstance.title;
+  var actualTitle = document.title;
+  assertEquals(expectedTitle, actualTitle);
+  assertEquals(pageInstance, topPage);
+}