Add a lock to the managed user settings page and require authentication for unlocking.

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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1318 matching lines @@
         'browser/ui/webui/options/browser_options_browsertest.js',
         'browser/ui/webui/options/certificate_manager_browsertest.js',
         'browser/ui/webui/options/chromeos/guest_mode_options_ui_browsertest.cc',
         '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/managed_user_passphrase_handler_browsertest.cc',
+        'browser/ui/webui/options/managed_user_set_passphrase_browsertest.js',
+        'browser/ui/webui/options/managed_user_set_passphrase_test.cc',
+        'browser/ui/webui/options/managed_user_set_passphrase_test.h',
         'browser/ui/webui/options/options_browsertest.js',
         'browser/ui/webui/options/options_ui_browsertest.cc',
         'browser/ui/webui/options/options_ui_browsertest.h',
         'browser/ui/webui/options/password_manager_browsertest.js',
         'browser/ui/webui/options/preferences_browsertest.cc',
         'browser/ui/webui/options/preferences_browsertest.h',
         'browser/ui/webui/options/search_engine_manager_browsertest.js',
         'browser/ui/webui/options/settings_format_browsertest.js',
         'browser/ui/webui/print_preview/print_preview_ui_browsertest.cc',
         'browser/ui/webui/sync_setup_browsertest.js',
@@ skipping 1633 matching lines @@
             'sync_integration_tests.isolate',
           ],
           'sources': [
             'sync_integration_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }