MD User Manager: "Select an account" should just be a label not a menu entry

chrome/test/data/webui/md_user_manager/create_profile_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('user_manager.create_profile_tests', function() {
   /** @return {!CreateProfileElement} */
   function createElement() {
     var createProfileElement = document.createElement('create-profile');
     document.body.appendChild(createProfileElement);
     return createProfileElement;
@@ skipping 51 matching lines @@
           // The 'learn more' link is visible.
           assertTrue(!!createProfileElement.$$('#learn-more > a'));
 
           // The dropdown menu becomes visible when the checkbox is checked.
           assertFalse(!!createProfileElement.$$('paper-dropdown-menu'));
 
           // Simulate checking the checkbox.
           MockInteractions.tap(createProfileElement.$$('paper-checkbox'));
           Polymer.dom.flush();
 
-          // The dropdown menu is visible and is populated with the sentinel
-          // item as well as the signed in users.
+          // The dropdown menu is visible and is populated with signed in users.
           var dropdownMenu = createProfileElement.$$('paper-dropdown-menu');
           assertTrue(!!dropdownMenu);
           var users = dropdownMenu.querySelectorAll('paper-item');
-          assertEquals(2, users.length);
+          assertEquals(1, users.length);
         });
       });
 
-      test('Sentinel item is the initially selected item', function() {
-        return browserProxy.whenCalled('getSignedInUsers').then(function() {
-          // Simulate checking the checkbox.
-          MockInteractions.tap(createProfileElement.$$('paper-checkbox'));
-          Polymer.dom.flush();
-
-          var dropdownMenu = createProfileElement.$$('paper-dropdown-menu');
-          var selector = dropdownMenu.querySelector('paper-listbox');
-          assertEquals(loadTimeData.getString('selectAnAccount'),
-                       selector.selectedItem.textContent.trim());
-        });
-      });
-
       test('Name is non-empty by default', function() {
         assertEquals('profile name', createProfileElement.$.nameInput.value);
       });
 
       test('Create button is disabled if name is empty or invalid', function() {
         assertEquals('profile name', createProfileElement.$.nameInput.value);
         assertFalse(createProfileElement.$.nameInput.invalid);
         assertFalse(createProfileElement.$.save.disabled);
 
         createProfileElement.$.nameInput.value = '';
@@ skipping 300 matching lines @@
       test('Create button is disabled', function() {
         assertTrue(createProfileElement.$.save.disabled);
       });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });