Allow navigation to chrome://md-settings/pointer-overlay

chrome/test/data/webui/settings/device_page_tests.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.
 
 cr.define('device_page_tests', function() {
   /** @enum {string} */
   var TestNames = {
     DevicePage: 'device page',
     Display: 'display',
     Keyboard: 'keyboard',
@@ skipping 141 matching lines @@
     suiteSetup(function() {
       // Disable animations so sub-pages open within one event loop.
       testing.Test.disableAnimationsAndTransitions();
     });
 
     setup(function(done) {
       fakeSystemDisplay = new settings.FakeSystemDisplay();
       settings.display.systemDisplayApi = fakeSystemDisplay;
 
       PolymerTest.clearBody();
+      settings.navigateTo(settings.Route.BASIC);
+
       devicePage = document.createElement('settings-device-page');
       devicePage.prefs = getFakePrefs();
       settings.DevicePageBrowserProxyImpl.instance_ =
           new TestDevicePageBrowserProxy();
 
       // settings-animated-pages expects a parent with data-page set.
       var basicPage = document.createElement('div');
       basicPage.dataset.page = 'basic';
       basicPage.appendChild(devicePage);
       document.body.appendChild(basicPage);
@@ skipping 350 matching lines @@
         expectTrue(displayPage.showMirror_(displayPage.displays));
         expectTrue(displayPage.isMirrored_(displayPage.displays));
       });
     });
   });
 
   return {
     TestNames: TestNames
   };
 });