MD Settings: Restore focus after closing dialogs, for startup page.

chrome/test/data/webui/settings/startup_urls_page_test.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('settings_startup_urls_page', function() {
   /**
    * @constructor
    * @implements {settings.StartupUrlsPageBrowserProxy}
    * @extends {settings.TestBrowserProxy}
    */
@@ skipping 232 matching lines @@
       assertTrue(!!addPageButton);
       assertFalse(!!page.$$('settings-startup-url-dialog'));
 
       MockInteractions.tap(addPageButton);
       Polymer.dom.flush();
       assertTrue(!!page.$$('settings-startup-url-dialog'));
     });
 
     test('EditPage_OpensDialog', function() {
       assertFalse(!!page.$$('settings-startup-url-dialog'));
-      page.fire(settings.EDIT_STARTUP_URL_EVENT, createSampleUrlEntry());
+      page.fire(
+          settings.EDIT_STARTUP_URL_EVENT,
+          {model: createSampleUrlEntry(), anchor: null});
       Polymer.dom.flush();
       assertTrue(!!page.$$('settings-startup-url-dialog'));
     });
 
     test('StartupPagesChanges_CloseOpenEditDialog', function() {
       var entry1 = {
         modelIndex: 2,
         title: 'Test page 1',
         tooltip: 'test tooltip',
         url: 'chrome://bar',
       };
 
       var entry2 = {
         modelIndex: 2,
         title: 'Test page 2',
         tooltip: 'test tooltip',
         url: 'chrome://foo',
       };
 
       cr.webUIListenerCallback('update-startup-pages', [entry1, entry2]);
-      page.fire(settings.EDIT_STARTUP_URL_EVENT, entry2);
+      page.fire(
+          settings.EDIT_STARTUP_URL_EVENT, {model: entry2, anchor: null});
       Polymer.dom.flush();
 
       assertTrue(!!page.$$('settings-startup-url-dialog'));
       cr.webUIListenerCallback('update-startup-pages', [entry1]);
       Polymer.dom.flush();
 
       assertFalse(!!page.$$('settings-startup-url-dialog'));
     });
 
     test('StarupPages_WhenExtensionControlled', function() {
@@ skipping 67 matching lines @@
     test('Editable', function() {
       assertFalse(!!element.editable);
       assertFalse(!!element.$$('#dots'));
 
       element.editable = true;
       Polymer.dom.flush();
       assertTrue(!!element.$$('#dots'));
     });
   });
 });