Use a service to create device management backends.

chrome/chrome_browser.gypi

 # Copyright (c) 2010 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': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 2387 matching lines @@
         'browser/policy/configuration_policy_provider.cc',
         'browser/policy/configuration_policy_provider.cc',
         'browser/policy/configuration_policy_provider.h',
         'browser/policy/configuration_policy_provider.h',
         'browser/policy/configuration_policy_provider_mac.cc',
         'browser/policy/configuration_policy_provider_mac.h',
         'browser/policy/configuration_policy_provider_win.cc',
         'browser/policy/configuration_policy_provider_win.h',
         'browser/policy/configuration_policy_store_interface.h',
         'browser/policy/device_management_backend.h',
-        'browser/policy/device_management_backend_impl.cc',
-        'browser/policy/device_management_backend_impl.h',
+        'browser/policy/device_management_service.cc',
+        'browser/policy/device_management_service.h',
         'browser/policy/device_management_policy_cache.cc',
         'browser/policy/device_management_policy_cache.h',
         'browser/policy/device_management_policy_provider.cc',
         'browser/policy/device_management_policy_provider.h',
         'browser/policy/device_token_fetcher.cc',
         'browser/policy/device_token_fetcher.h',
         'browser/policy/dummy_configuration_policy_provider.h',
         'browser/policy/file_based_policy_provider.cc',
         'browser/policy/file_based_policy_provider.h',
         'browser/policy/managed_prefs_banner_base.cc',
@@ skipping 1881 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: