MD Settings: fix route query in tests

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

 // Copyright 2015 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 Prototype for Settings page tests. */
 
 /** @const {string} Path to root from chrome/test/data/webui/settings/. */
 var ROOT_PATH = '../../../../../';
 
 // Polymer BrowserTest fixture.
@@ skipping 68 matching lines @@
     var router = document.querySelector('cr-settings').$$('settings-ui')
         .$$('settings-router');
     assert(!!router);
     return router;
   },
 
   /**
    * @return {boolean} True if the router's state is a root page, e.g. Basic.
    */
   isAtRoot: function() {
-    var router = this.getRouter();
-    return router.section == '' && router.subpage.length == 0;
+    var route = this.getRouter().currentRoute;
+    return route.section == '' && route.subpage.length == 0;

[tommycli, 2016/07/20 21:33:02]

Also perhaps it would be even clearer to check

route == settings.Route.BASIC || route == settings.Route.ADVANCED.

   },
 
   /** Navigates to the current root page, e.g. Basic. */
   backToRoot: function() {
     var router = document.querySelector('cr-settings').$$('settings-ui')
         .$$('settings-router');
     router.currentRoute = {
       page: router.currentRoute.page,
       section: '',
       subpage: [],
@@ skipping 27 matching lines @@
     // Any other stamped subpages should not be visible.
     var subpages = stampedChildren.filter(function(element) {
       return element.id != 'main';
     });
     for (var subpage of subpages) {
       assertEquals(subpage.offsetHeight, 0, 'Expected subpage #' + subpage.id +
           ' in ' + section.section + ' not to be visible.');
     }
   },
 };