Quick & dirty example of a WebUIBrowserTest using LoginManagerTestHelper.

chrome/chrome_tests.gypi

 # 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.
 {
   'includes': [
     'js_unittest_vars.gypi',
   ],
   'targets': [
     {
       'target_name': 'interactive_ui_tests',
@@ skipping 268 matching lines @@
             'browser/chromeos/input_method/textinput_surroundingtext_browsertest.cc',
             'browser/chromeos/input_method/textinput_test_helper.cc',
             'browser/chromeos/input_method/textinput_test_helper.h',
             'browser/chromeos/login/eula_browsertest.cc',
             'browser/chromeos/login/lock/screen_locker_browsertest.cc',
             'browser/chromeos/login/lock/screen_locker_tester.cc',
             'browser/chromeos/login/lock/screen_locker_tester.h',
             'browser/chromeos/login/login_browsertest.cc',
             'browser/chromeos/login/login_manager_test.cc',
             'browser/chromeos/login/login_manager_test.h',
+            'browser/chromeos/login/login_manager_test_helper.cc',
+            'browser/chromeos/login/login_manager_test_helper.h',
             'browser/chromeos/login/login_ui_browsertest.cc',
             'browser/chromeos/login/oobe_browsertest.cc',
             'browser/chromeos/login/users/wallpaper/wallpaper_manager_browsertest.cc',
             'browser/chromeos/login/users/wallpaper/wallpaper_manager_test_utils.cc',
             'browser/chromeos/login/users/wallpaper/wallpaper_manager_test_utils.h',
             'test/data/chromeos/service_login.html',
           ],
           'sources!': [
             # chromeos does not use cross-platform panels
             'browser/notifications/notification_browsertest.cc',
@@ skipping 624 matching lines @@
         'browser/chromeos/login/enrollment/mock_enrollment_screen.cc',
         'browser/chromeos/login/enrollment/mock_enrollment_screen.h',
         'browser/chromeos/login/existing_user_controller_browsertest.cc',
         'browser/chromeos/login/kiosk_browsertest.cc',
         'browser/chromeos/login/lock/screen_locker_tester.cc',
         'browser/chromeos/login/lock/screen_locker_tester.h',
         'browser/chromeos/login/login_screen_policy_browsertest.cc',
         'browser/chromeos/login/login_utils_browsertest.cc',
         'browser/chromeos/login/login_manager_test.cc',
         'browser/chromeos/login/login_manager_test.h',
+        'browser/chromeos/login/login_manager_test_helper.cc',
+        'browser/chromeos/login/login_manager_test_helper.h',
         'browser/chromeos/login/managed/managed_user_creation_browsertest.cc',
         'browser/chromeos/login/managed/managed_user_password_browsertest.cc',
         'browser/chromeos/login/managed/managed_user_test_base.cc',
         'browser/chromeos/login/managed/managed_user_test_base.h',
         'browser/chromeos/login/oobe_localization_browsertest.cc',
         'browser/chromeos/login/reset_browsertest.cc',
         'browser/chromeos/login/saml/saml_browsertest.cc',
         'browser/chromeos/login/session_login_browsertest.cc',
         'browser/chromeos/login/screens/mock_error_screen.cc',
         'browser/chromeos/login/screens/mock_error_screen.h',
@@ skipping 496 matching lines @@
         'browser/ui/webui/options/browser_options_browsertest.js',
         'browser/ui/webui/options/certificate_manager_browsertest.cc',
         'browser/ui/webui/options/certificate_manager_browsertest.js',
         'browser/ui/webui/options/clear_browser_data_browsertest.cc',
         'browser/ui/webui/options/chromeos/accounts_options_browsertest.cc',
         'browser/ui/webui/options/chromeos/accounts_options_browsertest.js',
         'browser/ui/webui/options/chromeos/bluetooth_options_browsertest.js',
         'browser/ui/webui/options/chromeos/date_time_options_browsertest.js',
         'browser/ui/webui/options/chromeos/guest_mode_options_ui_browsertest.cc',
         'browser/ui/webui/options/chromeos/shared_options_browsertest.cc',
+        'browser/ui/webui/options/chromeos/shared_options_browsertest.js',
         'browser/ui/webui/options/content_options_browsertest.js',
         'browser/ui/webui/options/content_settings_exception_area_browsertest.js',
         'browser/ui/webui/options/cookies_view_browsertest.js',
         'browser/ui/webui/options/edit_dictionary_browsertest.js',
         'browser/ui/webui/options/font_settings_browsertest.js',
         'browser/ui/webui/options/language_options_browsertest.js',
         'browser/ui/webui/options/language_options_dictionary_download_browsertest.js',
         'browser/ui/webui/options/manage_profile_browsertest.js',
         'browser/ui/webui/options/options_browsertest.cc',
         'browser/ui/webui/options/options_browsertest.js',
@@ skipping 1522 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }