Surface error messages from ONC parsing in about:policy.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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',
       'dependencies': [
@@ skipping 1736 matching lines @@
         'browser/policy/cloud_policy_provider.cc',
         'browser/policy/cloud_policy_provider.h',
         'browser/policy/cloud_policy_provider_impl.cc',
         'browser/policy/cloud_policy_provider_impl.h',
         'browser/policy/cloud_policy_subsystem.cc',
         'browser/policy/cloud_policy_subsystem.h',
         'browser/policy/config_dir_policy_provider.cc',
         'browser/policy/config_dir_policy_provider.h',
         'browser/policy/configuration_policy_handler.cc',
         'browser/policy/configuration_policy_handler.h',
+        'browser/policy/configuration_policy_handler_chromeos.cc',
+        'browser/policy/configuration_policy_handler_chromeos.h',
         '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',
@@ skipping 3478 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/history/in_memory_url_index_cache.proto' ],
       'variables': {
         'proto_in_dir': 'browser/history',
         'proto_out_dir': 'chrome/browser/history',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }