Implemented OwnerSettingsService::Set() method.

chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.cc

 // 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.
 
 #include "chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 80 matching lines @@
 
 void DeviceCloudPolicyStoreChromeOS::OwnershipStatusChanged() {
   // Nothing to do.
 }
 
 void DeviceCloudPolicyStoreChromeOS::DeviceSettingsUpdated() {
   if (!weak_factory_.HasWeakPtrs())
     UpdateFromService();
 }
 
+void DeviceCloudPolicyStoreChromeOS::OnDeviceSettingsServiceShutdown() {
+  device_settings_service_ = nullptr;
+}
+
 scoped_ptr<DeviceCloudPolicyValidator>
     DeviceCloudPolicyStoreChromeOS::CreateValidator(
         const em::PolicyFetchResponse& policy) {
   scoped_ptr<DeviceCloudPolicyValidator> validator(
       DeviceCloudPolicyValidator::Create(
           scoped_ptr<em::PolicyFetchResponse>(
               new em::PolicyFetchResponse(policy)),
           background_task_runner_));
   validator->ValidateDomain(install_attributes_->GetDomain());
   validator->ValidatePolicyType(dm_protocol::kChromeDevicePolicyType);
@@ skipping 96 matching lines @@
     case chromeos::DeviceSettingsService::STORE_VALIDATION_ERROR:
     case chromeos::DeviceSettingsService::STORE_TEMP_VALIDATION_ERROR:
       status_ = STATUS_LOAD_ERROR;
       break;
   }
 
   NotifyStoreError();
 }
 
 }  // namespace policy