Refactor FileBasedPolicyProvider, introduce AsynchronousPolicyProvider.

chrome/chrome_browser.gypi

 # Copyright (c) 2010 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': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 2399 matching lines @@
         'browser/plugin_exceptions_table_model.h',
         'browser/plugin_installer.cc',
         'browser/plugin_installer.h',
         'browser/plugin_process_host.cc',
         'browser/plugin_process_host.h',
         'browser/plugin_process_host_mac.cc',
         'browser/plugin_service.cc',
         'browser/plugin_service.h',
         'browser/plugin_updater.cc',
         'browser/plugin_updater.h',
+        'browser/policy/asynchronous_policy_loader.cc',
+        'browser/policy/asynchronous_policy_loader.h',
+        'browser/policy/asynchronous_policy_provider.cc',
+        'browser/policy/asynchronous_policy_provider.h',
         'browser/policy/config_dir_policy_provider.cc',
         'browser/policy/config_dir_policy_provider.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.cc',
         'browser/policy/configuration_policy_provider.h',
         'browser/policy/configuration_policy_provider.h',
         'browser/policy/configuration_policy_provider_mac.cc',
         'browser/policy/configuration_policy_provider_mac.h',
@@ skipping 1936 matching lines @@
       ],
     },
   ],
 }
 
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