Handle a non-existing promise when receiving a signin error in the SupervisedUserListData.

chrome/browser/ui/webui/options/manage_profile_browsertest.js

 // Copyright 2013 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.
 
 // None of these tests is relevant for Chrome OS.
 GEN('#if !defined(OS_CHROMEOS)');
 
 /**
  * TestFixture for ManageProfileOverlay and CreateProfileOverlay WebUI testing.
  * @extends {testing.Test}
@@ skipping 323 matching lines @@
   assertEquals('createProfile', PageManager.getTopmostVisiblePage().name);
   var errorBubble = $('create-profile-error-bubble');
   assertTrue(errorBubble.hidden);
 
   CreateProfileOverlay.onError('An Error Message!');
   assertEquals('createProfile', PageManager.getTopmostVisiblePage().name);
   assertFalse(errorBubble.hidden);
 });
 
 // The name and email should be inserted into the confirmation dialog.
-// Disbaled because of flakiness on Mac: crbug.com/405709
-GEN('#if defined(OS_MACOSX)');
-GEN('#define MAYBE_CreateConfirmationText \\');
-GEN('    DISABLED_CreateConfirmationText');
-GEN('#else');
-GEN('#define MAYBE_CreateConfirmationText CreateConfirmationText');
-GEN('#endif');
-TEST_F('ManageProfileUITest', 'MAYBE_CreateConfirmationText', function() {
+TEST_F('ManageProfileUITest', 'CreateConfirmationText', function() {
   var self = this;
   var custodianEmail = 'foo@example.com';
 
   // Checks the strings in the confirmation dialog. If |expectedNameText| is
   // given, it should be present in the dialog's textContent; otherwise the name
   // is expected. If |expectedNameHtml| is given, it should be present in the
   // dialog's innerHTML; otherwise the expected text is expected in the HTML
   // too.
   function checkDialog(name, expectedNameText, expectedNameHtml) {
     var expectedText = expectedNameText || name;
@@ skipping 291 matching lines @@
 
   // Select another icon and check if the profile name was updated.
   var oldName = nameEl.value;
   gridEl.selectedItem = iconURLs[1];
   expectEquals(oldName, nameEl.value);
 
   PageManager.closeOverlay();
 });
 
 GEN('#endif  // OS_CHROMEOS');