Implement the mac policy provider based on the AsyncPolicyLoader.

chrome/chrome_tests.gypi

 # Copyright (c) 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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1345 matching lines @@
         'browser/policy/cloud_policy_client_unittest.cc',
         'browser/policy/cloud_policy_controller_unittest.cc',
         'browser/policy/cloud_policy_provider_unittest.cc',
         'browser/policy/cloud_policy_refresh_scheduler_unittest.cc',
         'browser/policy/cloud_policy_service_unittest.cc',
         'browser/policy/cloud_policy_subsystem_unittest.cc',
         'browser/policy/config_dir_policy_provider_unittest.cc',
         'browser/policy/configuration_policy_handler_chromeos_unittest.cc',
         'browser/policy/configuration_policy_handler_unittest.cc',
         'browser/policy/configuration_policy_pref_store_unittest.cc',
-        'browser/policy/configuration_policy_provider_mac_unittest.cc',
         'browser/policy/configuration_policy_provider_test.cc',
         'browser/policy/configuration_policy_provider_test.h',
         'browser/policy/configuration_policy_provider_win_unittest.cc',
         'browser/policy/cros_user_policy_cache_unittest.cc',
         'browser/policy/device_management_service_unittest.cc',
         'browser/policy/device_policy_cache_unittest.cc',
         'browser/policy/device_status_collector_unittest.cc',
         'browser/policy/device_token_fetcher_unittest.cc',
         'browser/policy/enterprise_install_attributes_unittest.cc',
         'browser/policy/file_based_policy_provider_unittest.cc',
         'browser/policy/logging_work_scheduler.cc',
         'browser/policy/logging_work_scheduler.h',
         'browser/policy/logging_work_scheduler_unittest.cc',
         'browser/policy/mock_cloud_policy_client.cc',
         'browser/policy/mock_cloud_policy_client.h',
         'browser/policy/mock_cloud_policy_store.cc',
         'browser/policy/mock_cloud_policy_store.h',
         'browser/policy/mock_configuration_policy_provider.cc',
         'browser/policy/mock_configuration_policy_provider.h',
         'browser/policy/mock_device_management_service.cc',
         'browser/policy/mock_device_management_service.h',
         'browser/policy/network_configuration_updater_unittest.cc',
         'browser/policy/policy_bundle_unittest.cc',
+        'browser/policy/policy_loader_mac_unittest.cc',
         'browser/policy/policy_map_unittest.cc',
         'browser/policy/policy_path_parser_unittest.cc',
         'browser/policy/policy_service_impl_unittest.cc',
         'browser/policy/proxy_policy_provider_unittest.cc',
         'browser/policy/testing_cloud_policy_subsystem.cc',
         'browser/policy/testing_cloud_policy_subsystem.h',
         'browser/policy/testing_policy_url_fetcher_factory.cc',
         'browser/policy/testing_policy_url_fetcher_factory.h',
         'browser/policy/url_blacklist_manager_unittest.cc',
         'browser/policy/user_cloud_policy_manager_unittest.cc',
@@ skipping 3253 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }