Re-write many calls to WrapUnique() with MakeUnique()

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"
@@ skipping 35 matching lines @@
 void AccountConsistencyServiceFactory::RegisterBrowserStatePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   AccountConsistencyService::RegisterPrefs(registry);
 }
 
 std::unique_ptr<KeyedService>
 AccountConsistencyServiceFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
   ios::ChromeBrowserState* chrome_browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
-  return base::WrapUnique(new AccountConsistencyService(
+  return base::MakeUnique<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)));
+      ios::SigninManagerFactory::GetForBrowserState(chrome_browser_state));
 }
 
 }  // namespace ios