MD Settings: Lazy load the contents of the "advanced" settings.

chrome/test/data/webui/settings/easy_unlock_browsertest_chromeos.js

 // Copyright 2016 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.
 
 /** @fileoverview Suite of tests for Easy Unlock within People section. */
 
 GEN_INCLUDE(['settings_page_browsertest.js']);
 
 /**
  * @constructor
@@ skipping 94 matching lines @@
   /** @type {?TestEasyUnlockBrowserProxy} */
   var browserProxy = null;
 
   /** @type {?CrSettingsPrefs} */
   var prefs = null;
 
   var self = this;
 
   suite('SettingsEasyUnlock', function() {
     suiteSetup(function() {
-      self.getPage('basic').set('pageVisibility.people', true);
+      self.basicPage.set('pageVisibility.people', true);
       Polymer.dom.flush();
 
       // These overrides are necessary for this test to function on ChromeOS
       // bots that do not have Bluetooth (don't actually support Easy Unlock).
       loadTimeData.overrideValues({
         easyUnlockAllowed: true,
         easyUnlockProximityDetectionAllowed: false,
 
         easyUnlockSectionTitle: '',
         easyUnlockLearnMoreURL: '',
@@ skipping 108 matching lines @@
       }).then(function() {
         Polymer.dom.flush();
         expectFalse(turnOffDialog.$.dialog.open);
       });
     });
   });
 
   // Run all registered tests.
   mocha.run();
 });