Clean-up of the system shutdown code paths

chrome/chrome_browser_chromeos.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': {
     # These files lists are shared with the GN build.
     'browser_chromeos_sources': [
         # All .cc, .h, .m, and .mm files under browser/chromeos, except for tests
@@ skipping 855 matching lines @@
         'browser/chromeos/settings/device_settings_provider.cc',
         'browser/chromeos/settings/device_settings_provider.h',
         'browser/chromeos/settings/device_settings_service.cc',
         'browser/chromeos/settings/device_settings_service.h',
         'browser/chromeos/settings/owner_flags_storage.cc',
         'browser/chromeos/settings/owner_flags_storage.h',
         'browser/chromeos/settings/session_manager_operation.cc',
         'browser/chromeos/settings/session_manager_operation.h',
         'browser/chromeos/settings/stub_cros_settings_provider.cc',
         'browser/chromeos/settings/stub_cros_settings_provider.h',
+        'browser/chromeos/settings/shutdown_policy_handler.cc',
+        'browser/chromeos/settings/shutdown_policy_handler.h',
         'browser/chromeos/settings/system_settings_provider.cc',
         'browser/chromeos/settings/system_settings_provider.h',
         'browser/chromeos/settings/token_encryptor.cc',
         'browser/chromeos/settings/token_encryptor.h',
         'browser/chromeos/sim_dialog_delegate.cc',
         'browser/chromeos/sim_dialog_delegate.h',
         'browser/chromeos/status/data_promo_notification.cc',
         'browser/chromeos/status/data_promo_notification.h',
         'browser/chromeos/status/network_menu.cc',
         'browser/chromeos/status/network_menu.h',
@@ skipping 397 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }