Add a header when fetching pages under the DMServer URL.

components/policy.gypi

 # Copyright 2013 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': 'policy_component',
       'type': '<(component)',
       'dependencies': [
@@ skipping 23 matching lines @@
             'policy/core/browser/cloud/message_util.cc',
             'policy/core/browser/cloud/message_util.h',
             'policy/core/browser/configuration_policy_handler.cc',
             'policy/core/browser/configuration_policy_handler.h',
             'policy/core/browser/configuration_policy_handler_list.cc',
             'policy/core/browser/configuration_policy_handler_list.h',
             'policy/core/browser/configuration_policy_pref_store.cc',
             'policy/core/browser/configuration_policy_pref_store.h',
             'policy/core/browser/policy_error_map.cc',
             'policy/core/browser/policy_error_map.h',
+            'policy/core/browser/policy_header_io_helper.cc',
+            'policy/core/browser/policy_header_io_helper.h',
             'policy/core/common/cloud/cloud_external_data_manager.cc',
             'policy/core/common/cloud/cloud_external_data_manager.h',
             'policy/core/common/cloud/cloud_policy_client.cc',
             'policy/core/common/cloud/cloud_policy_client.h',
             'policy/core/common/cloud/cloud_policy_client_registration_helper.cc',
             'policy/core/common/cloud/cloud_policy_client_registration_helper.h',
             'policy/core/common/cloud/cloud_policy_constants.cc',
             'policy/core/common/cloud/cloud_policy_constants.h',
             'policy/core/common/cloud/cloud_policy_core.cc',
             'policy/core/common/cloud/cloud_policy_core.h',
@@ skipping 197 matching lines @@
             'policy/core/common/policy_test_utils.cc',
             'policy/core/common/policy_test_utils.h',
             'policy/core/common/preferences_mock_mac.cc',
             'policy/core/common/preferences_mock_mac.h',
           ],
         },
       ],
     }],
   ],
 }