Convert //components/[f-n]* from scoped_ptr to std::unique_ptr

components/keyed_service/core/keyed_service_shutdown_notifier.cc

 // Copyright 2015 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 "components/keyed_service/core/keyed_service_export.h"
 #include "components/keyed_service/core/keyed_service_shutdown_notifier.h"
 
 KeyedServiceShutdownNotifier::KeyedServiceShutdownNotifier() {
 }
 KeyedServiceShutdownNotifier::~KeyedServiceShutdownNotifier() {
 }
 
-scoped_ptr<base::CallbackList<void()>::Subscription>
+std::unique_ptr<base::CallbackList<void()>::Subscription>
 KeyedServiceShutdownNotifier::Subscribe(const base::Closure& callback) {
   return callback_list_.Add(callback);
 }
 
 void KeyedServiceShutdownNotifier::Shutdown() {
   callback_list_.Notify();
 }