Add DeviceADPolicyManager to provide AD policy.

chrome/browser/chromeos/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//printing/features/features.gni")
 import("//third_party/protobuf/proto_library.gni")
 
@@ skipping 967 matching lines @@
     "policy/browser_policy_connector_chromeos.cc",
     "policy/browser_policy_connector_chromeos.h",
     "policy/cloud_external_data_manager_base.cc",
     "policy/cloud_external_data_manager_base.h",
     "policy/cloud_external_data_policy_observer.cc",
     "policy/cloud_external_data_policy_observer.h",
     "policy/cloud_external_data_store.cc",
     "policy/cloud_external_data_store.h",
     "policy/configuration_policy_handler_chromeos.cc",
     "policy/configuration_policy_handler_chromeos.h",
+    "policy/device_ad_policy_manager.cc",
+    "policy/device_ad_policy_manager.h",
     "policy/device_cloud_policy_initializer.cc",
     "policy/device_cloud_policy_initializer.h",
     "policy/device_cloud_policy_manager_chromeos.cc",
     "policy/device_cloud_policy_manager_chromeos.h",
     "policy/device_cloud_policy_store_chromeos.cc",
     "policy/device_cloud_policy_store_chromeos.h",
     "policy/device_cloud_policy_validator.cc",
     "policy/device_cloud_policy_validator.h",
     "policy/device_local_account.cc",
     "policy/device_local_account.h",
@@ skipping 634 matching lines @@
     "policy/proto/chrome_device_policy.proto",
     "policy/proto/install_attributes.proto",
   ]
 }
 
 proto_library("attestation_proto") {
   sources = [
     "attestation/attestation_key_payload.proto",
   ]
 }