Move chromeos::version_loader to src/chromeos/system

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 935 matching lines @@
         'browser/chromeos/ui/mobile_config_ui.cc',
         'browser/chromeos/ui/mobile_config_ui.h',
         'browser/chromeos/ui/screen_capture_notification_ui_chromeos.cc',
         'browser/chromeos/ui/screen_capture_notification_ui_chromeos.h',
         'browser/chromeos/ui_proxy_config.cc',
         'browser/chromeos/ui_proxy_config.h',
         'browser/chromeos/ui_proxy_config_service.cc',
         'browser/chromeos/ui_proxy_config_service.h',
         'browser/chromeos/upgrade_detector_chromeos.cc',
         'browser/chromeos/upgrade_detector_chromeos.h',
-        'browser/chromeos/version_loader.cc',
-        'browser/chromeos/version_loader.h',
         'browser/supervised_user/chromeos/manager_password_service.cc',
         'browser/supervised_user/chromeos/manager_password_service.h',
         'browser/supervised_user/chromeos/manager_password_service_factory.cc',
         'browser/supervised_user/chromeos/manager_password_service_factory.h',
         'browser/supervised_user/chromeos/supervised_user_password_service.cc',
         'browser/supervised_user/chromeos/supervised_user_password_service.h',
         'browser/supervised_user/chromeos/supervised_user_password_service_factory.cc',
         'browser/supervised_user/chromeos/supervised_user_password_service_factory.h',
     ],
     'browser_chromeos_non_athena_sources': [
@@ skipping 326 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' ]
     },
   ],
 }