Implement the mac policy provider based on the AsyncPolicyLoader.

chrome/chrome_browser.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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 1589 matching lines @@
         'browser/policy/configuration_policy_handler_list.cc',
         'browser/policy/configuration_policy_handler_list.h',
         'browser/policy/configuration_policy_loader_win.cc',
         'browser/policy/configuration_policy_loader_win.h',
         'browser/policy/configuration_policy_pref_store.cc',
         'browser/policy/configuration_policy_pref_store.h',
         'browser/policy/configuration_policy_provider.cc',
         'browser/policy/configuration_policy_provider.h',
         'browser/policy/configuration_policy_provider_delegate_win.cc',
         'browser/policy/configuration_policy_provider_delegate_win.h',
-        'browser/policy/configuration_policy_provider_mac.cc',
-        'browser/policy/configuration_policy_provider_mac.h',
         'browser/policy/configuration_policy_provider_win.cc',
         'browser/policy/configuration_policy_provider_win.h',
         'browser/policy/cros_user_policy_cache.cc',
         'browser/policy/cros_user_policy_cache.h',
         'browser/policy/delayed_work_scheduler.cc',
         'browser/policy/delayed_work_scheduler.h',
         'browser/policy/device_management_service.cc',
         'browser/policy/device_management_service.h',
         'browser/policy/device_policy_cache.cc',
         'browser/policy/device_policy_cache.h',
         'browser/policy/device_token_fetcher.cc',
         'browser/policy/device_token_fetcher.h',
         'browser/policy/device_status_collector.cc',
         'browser/policy/device_status_collector.h',
         'browser/policy/enterprise_install_attributes.cc',
         'browser/policy/enterprise_install_attributes.h',
         'browser/policy/enterprise_metrics.cc',
         'browser/policy/enterprise_metrics.h',
         'browser/policy/file_based_policy_loader.cc',
         'browser/policy/file_based_policy_loader.h',
         'browser/policy/file_based_policy_provider.cc',
         'browser/policy/file_based_policy_provider.h',
         'browser/policy/network_configuration_updater.cc',
         'browser/policy/network_configuration_updater.h',
         'browser/policy/policy_bundle.cc',
         'browser/policy/policy_bundle.h',
         'browser/policy/policy_constants.h',
         'browser/policy/policy_error_map.cc',
         'browser/policy/policy_error_map.h',
+        'browser/policy/policy_loader_mac.cc',
+        'browser/policy/policy_loader_mac.h',
         'browser/policy/policy_notifier.cc',
         'browser/policy/policy_notifier.h',
         'browser/policy/policy_path_parser.h',
         'browser/policy/policy_path_parser_mac.mm',
         'browser/policy/policy_path_parser_linux.cc',
         'browser/policy/policy_path_parser_win.cc',
         'browser/policy/policy_service.cc',
         'browser/policy/policy_service.h',
         'browser/policy/policy_service_impl.cc',
         'browser/policy/policy_service_impl.h',
@@ skipping 3535 matching lines @@
         'browser/metrics/proto/study.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/metrics/proto',
         'proto_out_dir': 'chrome/browser/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }