Add ManagedUserSettingsService and a SupervisedUserPrefStore using it.

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 950 matching lines @@
         'browser/local_discovery/privet_confirm_api_flow_unittest.cc',
         'browser/local_discovery/privet_http_unittest.cc',
         'browser/local_discovery/privet_url_fetcher_unittest.cc',
         'browser/local_discovery/cloud_print_account_manager_unittest.cc',
         'browser/mac/keystone_glue_unittest.mm',
         'browser/managed_mode/managed_mode_url_filter_unittest.cc',
         'browser/managed_mode/managed_user_service_unittest.cc',
         'browser/managed_mode/managed_user_sync_service_unittest.cc',
         'browser/managed_mode/managed_user_refresh_token_fetcher_unittest.cc',
         'browser/managed_mode/managed_user_registration_utility_unittest.cc',
+        'browser/managed_mode/managed_user_settings_service_unittest.cc',
+        'browser/managed_mode/supervised_user_pref_store_unittest.cc',
         'browser/media/desktop_media_picker_model_unittest.cc',
         'browser/media/webrtc_log_uploader_unittest.cc',
         'browser/media_galleries/fileapi/native_media_file_util_unittest.cc',
         'browser/media_galleries/linux/mtp_device_object_enumerator_unittest.cc',
         'browser/media_galleries/mac/mtp_device_delegate_impl_mac_unittest.mm',
         'browser/media_galleries/win/mtp_device_delegate_impl_win_unittest.cc',
         'browser/media_galleries/media_file_system_registry_unittest.cc',
         'browser/media_galleries/media_galleries_dialog_controller_mock.cc',
         'browser/media_galleries/media_galleries_dialog_controller_mock.h',
         'browser/media_galleries/media_galleries_permissions_unittest.cc',
@@ skipping 1774 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }