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

chrome/chrome_tests_unit.gypi

  # Copyright 2012 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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 846 matching lines @@
         'browser/intents/native_services_unittest.cc',
         'browser/intents/register_intent_handler_infobar_delegate_unittest.cc',
         'browser/intents/web_intents_registry_unittest.cc',
         'browser/intents/web_intents_reporting_unittest.cc',
         'browser/intents/web_intents_util_unittest.cc',
         'browser/internal_auth_unittest.cc',
         'browser/language_usage_metrics_unittest.cc',
         'browser/mac/keystone_glue_unittest.mm',
         'browser/managed_mode/managed_mode_unittest.cc',
         'browser/managed_mode/managed_mode_url_filter_unittest.cc',
+        'browser/managed_mode/managed_user_passphrase_unittest.cc',
         'browser/managed_mode/managed_user_service_unittest.cc',
         'browser/media_gallery/linux/mtp_device_object_enumerator_unittest.cc',
         'browser/media_gallery/media_file_system_registry_unittest.cc',
         'browser/media_gallery/media_galleries_dialog_controller_mock.cc',
         'browser/media_gallery/media_galleries_dialog_controller_mock.h',
         'browser/media_gallery/media_galleries_preferences_unittest.cc',
         'browser/media_gallery/media_gallery_database_unittest.cc',
         'browser/media_gallery/win/mtp_device_object_enumerator_unittest.cc',
         'browser/metrics/metrics_log_unittest.cc',
         'browser/metrics/metrics_log_serializer_unittest.cc',
@@ skipping 1249 matching lines @@
             'browser/shell_integration_unittest.cc',
 
             # No service process (which also requires multiprocess lock).
             'common/multi_process_lock_unittest.cc',
 
             # Sync setup uses native ui.
             'browser/ui/webui/sync_setup_handler_unittest.cc',
 
             'browser/browser_commands_unittest.cc',
             'browser/download/download_shelf_unittest.cc',
+            'browser/managed_mode/managed_user_passphrase_unittest.cc',
             'browser/net/gaia/gaia_oauth_fetcher_unittest.cc',
             'browser/page_cycler/page_cycler_unittest.cc',
             'browser/profiles/off_the_record_profile_impl_unittest.cc',
             'browser/sync/profile_sync_service_session_unittest.cc',
             'browser/sync/sync_global_error_unittest.cc',
             'browser/tab_contents/render_view_context_menu_unittest.cc',
             'browser/ui/bookmarks/bookmark_context_menu_controller_unittest.cc',
             'browser/ui/bookmarks/bookmark_prompt_controller_unittest.cc',
             'browser/ui/browser_command_controller_unittest.cc',
             'browser/ui/browser_iterator_unittest.cc',
@@ skipping 240 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }