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

ios/chrome/browser/signin/gaia_cookie_manager_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/signin/gaia_cookie_manager_service_factory.h"
 
+#include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/signin/core/browser/gaia_cookie_manager_service.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "google_apis/gaia/gaia_constants.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/signin/oauth2_token_service_factory.h"
 #include "ios/chrome/browser/signin/signin_client_factory.h"
 
@@ skipping 15 matching lines @@
   return static_cast<GaiaCookieManagerService*>(
       GetInstance()->GetServiceForBrowserState(browser_state, true));
 }
 
 // static
 GaiaCookieManagerServiceFactory*
 GaiaCookieManagerServiceFactory::GetInstance() {
   return base::Singleton<GaiaCookieManagerServiceFactory>::get();
 }
 
-scoped_ptr<KeyedService>
+std::unique_ptr<KeyedService>
 GaiaCookieManagerServiceFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
   ios::ChromeBrowserState* chrome_browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
-  return make_scoped_ptr(new GaiaCookieManagerService(
+  return base::WrapUnique(new GaiaCookieManagerService(
       OAuth2TokenServiceFactory::GetForBrowserState(chrome_browser_state),
       GaiaConstants::kChromeSource,
       SigninClientFactory::GetForBrowserState(chrome_browser_state)));
 }
 
 }  // namespace ios