Refactor: Inject StatisticsProvider as a dependency of DeviceCloudPolicyInitializer.

chrome/browser/chromeos/policy/fake_device_cloud_policy_initializer.cc

 // 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.
 
 #include "chrome/browser/chromeos/policy/fake_device_cloud_policy_initializer.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/sequenced_task_runner.h"
 #include "chromeos/attestation/mock_attestation_flow.h"
 #include "components/policy/core/common/cloud/device_management_service.h"
 
 namespace policy {
 
 FakeDeviceCloudPolicyInitializer::FakeDeviceCloudPolicyInitializer()
     : DeviceCloudPolicyInitializer(
-          NULL,  // local_state
-          NULL,  // enterprise_service
+          nullptr,  // local_state
+          nullptr,  // enterprise_service
           // background_task_runner
-          scoped_refptr<base::SequencedTaskRunner>(NULL),
-          NULL,  // install_attributes
-          NULL,  // state_keys_broker
-          NULL,  // device_store
-          NULL,  // manager
-          NULL,  // async_caller
-          base::MakeUnique<chromeos::attestation::MockAttestationFlow>()),
+          scoped_refptr<base::SequencedTaskRunner>(nullptr),
+          nullptr,  // install_attributes
+          nullptr,  // state_keys_broker
+          nullptr,  // device_store
+          nullptr,  // manager
+          nullptr,  // async_caller
+          base::MakeUnique<chromeos::attestation::MockAttestationFlow>(),
+          nullptr),  // statistics_provider
       was_start_enrollment_called_(false),
       enrollment_status_(
           EnrollmentStatus::ForStatus(EnrollmentStatus::STATUS_SUCCESS)) {}
 
 void FakeDeviceCloudPolicyInitializer::Init() {
 }
 
 void FakeDeviceCloudPolicyInitializer::Shutdown() {
 }
 
 void FakeDeviceCloudPolicyInitializer::StartEnrollment(
     DeviceManagementService* device_management_service,
     const EnrollmentConfig& enrollment_config,
     const std::string& auth_token,
     const EnrollmentCallback& enrollment_callback) {
   was_start_enrollment_called_ = true;
   enrollment_callback.Run(enrollment_status_);
 }
 
 }  // namespace policy