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

ios/chrome/browser/signin/account_consistency_service_factory.mm

 // 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/signin/account_consistency_service_factory.h"
 
+#include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/signin/ios/browser/account_consistency_service.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/content_settings/cookie_settings_factory.h"
 #include "ios/chrome/browser/signin/account_reconcilor_factory.h"
 #include "ios/chrome/browser/signin/gaia_cookie_manager_service_factory.h"
 #include "ios/chrome/browser/signin/signin_client_factory.h"
 #include "ios/chrome/browser/signin/signin_manager_factory.h"
 
@@ skipping 23 matching lines @@
 AccountConsistencyServiceFactory*
 AccountConsistencyServiceFactory::GetInstance() {
   return base::Singleton<AccountConsistencyServiceFactory>::get();
 }
 
 void AccountConsistencyServiceFactory::RegisterBrowserStatePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   AccountConsistencyService::RegisterPrefs(registry);
 }
 
-scoped_ptr<KeyedService>
+std::unique_ptr<KeyedService>
 AccountConsistencyServiceFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
   ios::ChromeBrowserState* chrome_browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
-  return make_scoped_ptr(new AccountConsistencyService(
+  return base::WrapUnique(new AccountConsistencyService(
       chrome_browser_state,
       ios::AccountReconcilorFactory::GetForBrowserState(chrome_browser_state),
       ios::CookieSettingsFactory::GetForBrowserState(chrome_browser_state),
       GaiaCookieManagerServiceFactory::GetForBrowserState(chrome_browser_state),
       SigninClientFactory::GetForBrowserState(chrome_browser_state),
       ios::SigninManagerFactory::GetForBrowserState(chrome_browser_state)));
 }
 
 }  // namespace ios