Move chromeos::version_loader to src/chromeos/system

chrome/chrome_tests_unit.gypi

 # Copyright 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': {
     'chrome_unit_tests_sources': [
       '../apps/saved_files_service_unittest.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
@@ skipping 232 matching lines @@
       'browser/chromeos/settings/device_oauth2_token_service_unittest.cc',
       'browser/chromeos/settings/device_settings_provider_unittest.cc',
       'browser/chromeos/settings/device_settings_service_unittest.cc',
       'browser/chromeos/settings/session_manager_operation_unittest.cc',
       'browser/chromeos/settings/stub_cros_settings_provider_unittest.cc',
       'browser/chromeos/system/automatic_reboot_manager_unittest.cc',
       'browser/chromeos/system/device_disabling_manager_unittest.cc',
       'browser/chromeos/timezone/timezone_unittest.cc',
       'browser/chromeos/ui/accessibility_focus_ring_controller_unittest.cc',
       'browser/chromeos/ui/idle_app_name_notification_view_unittest.cc',
-      'browser/chromeos/version_loader_unittest.cc',
       'browser/command_updater_unittest.cc',
       'browser/component_updater/test/cld_component_installer_unittest.cc',
       'browser/component_updater/test/component_installers_unittest.cc',
       'browser/component_updater/test/component_updater_service_unittest.cc',
       'browser/content_settings/content_settings_default_provider_unittest.cc',
       'browser/content_settings/content_settings_mock_observer.cc',
       'browser/content_settings/content_settings_mock_observer.h',
       'browser/content_settings/content_settings_origin_identifier_value_map_unittest.cc',
       'browser/content_settings/content_settings_policy_provider_unittest.cc',
       'browser/content_settings/content_settings_pref_provider_unittest.cc',
@@ skipping 2684 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }