Improve documentation for special-purpose policy providers.

components/policy/policy_common.gypi

 # Copyright 2014 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.
 
 {
   # GN version: //components/policy/core/common
   'dependencies': [
     '../base/base.gyp:base',
   ],
   'defines': [
@@ skipping 72 matching lines @@
         'core/common/async_policy_loader.h',
         'core/common/async_policy_provider.cc',
         'core/common/async_policy_provider.h',
         'core/common/config_dir_policy_loader.cc',
         'core/common/config_dir_policy_loader.h',
         'core/common/configuration_policy_provider.cc',
         'core/common/configuration_policy_provider.h',
         'core/common/external_data_fetcher.cc',
         'core/common/external_data_fetcher.h',
         'core/common/external_data_manager.h',
-        'core/common/forwarding_policy_provider.cc',
-        'core/common/forwarding_policy_provider.h',
         'core/common/mac_util.cc',
         'core/common/mac_util.h',
         'core/common/policy_bundle.cc',
         'core/common/policy_bundle.h',
         'core/common/policy_details.h',
+        'core/common/policy_load_status.cc',
+        'core/common/policy_load_status.h',
         'core/common/policy_loader_ios.h',
         'core/common/policy_loader_ios.mm',
         'core/common/policy_loader_mac.cc',
         'core/common/policy_loader_mac.h',
         'core/common/policy_loader_win.cc',
         'core/common/policy_loader_win.h',
-        'core/common/policy_load_status.cc',
-        'core/common/policy_load_status.h',
         'core/common/policy_map.cc',
         'core/common/policy_map.h',
         'core/common/policy_namespace.cc',
         'core/common/policy_namespace.h',
         'core/common/policy_pref_names.cc',
         'core/common/policy_pref_names.h',
         'core/common/policy_provider_android.cc',
         'core/common/policy_provider_android.h',
         'core/common/policy_provider_android_delegate.h',
         'core/common/policy_service.cc',
@@ skipping 11 matching lines @@
         'core/common/preg_parser_win.h',
         'core/common/registry_dict_win.cc',
         'core/common/registry_dict_win.h',
         'core/common/schema.cc',
         'core/common/schema.h',
         'core/common/schema_internal.h',
         'core/common/schema_map.cc',
         'core/common/schema_map.h',
         'core/common/schema_registry.cc',
         'core/common/schema_registry.h',
+        'core/common/schema_registry_tracking_policy_provider.cc',
+        'core/common/schema_registry_tracking_policy_provider.h',
         'policy_export.h',
       ],
       'conditions': [
         ['OS=="android"', {
           'sources!': [
             'core/common/async_policy_loader.cc',
             'core/common/async_policy_loader.h',
             'core/common/async_policy_provider.cc',
             'core/common/async_policy_provider.h',
           ],
@@ skipping 56 matching lines @@
         'core/common/policy_pref_names.cc',
         'core/common/policy_pref_names.h',
         'core/common/policy_service.cc',
         'core/common/policy_service.h',
         'core/common/policy_service_stub.cc',
         'core/common/policy_service_stub.h',
       ],
     }],
   ],
 }