Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/sync/fake_sync_service_factory.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 "ios/chrome/browser/sync/fake_sync_service_factory.h"
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/sync_driver/fake_sync_service.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 
 namespace {
 
 class KeyedFakeSyncService : public KeyedService {
  public:
@@ skipping 35 matching lines @@
       ->fake_sync_service();
 }
 
 FakeSyncServiceFactory::FakeSyncServiceFactory()
     : BrowserStateKeyedServiceFactory(
           "FakeSyncService",
           BrowserStateDependencyManager::GetInstance()) {}
 
 FakeSyncServiceFactory::~FakeSyncServiceFactory() {}
 
-scoped_ptr<KeyedService> FakeSyncServiceFactory::BuildServiceInstanceFor(
+std::unique_ptr<KeyedService> FakeSyncServiceFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
-  return make_scoped_ptr(new KeyedFakeSyncService);
+  return base::WrapUnique(new KeyedFakeSyncService);
 }
 
 }  // namespace ios