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

ios/chrome/browser/web_data_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/web_data_service_factory.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/autofill/core/browser/webdata/autofill_webdata_service.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/search_engines/keyword_web_data_service.h"
 #include "components/signin/core/browser/webdata/token_web_data.h"
 #include "components/webdata_services/web_data_service_wrapper.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/browser_state_otr_helper.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
@@ skipping 66 matching lines @@
 
 WebDataServiceFactory::WebDataServiceFactory()
     : BrowserStateKeyedServiceFactory(
           "WebDataService",
           BrowserStateDependencyManager::GetInstance()) {
 }
 
 WebDataServiceFactory::~WebDataServiceFactory() {
 }
 
-scoped_ptr<KeyedService> WebDataServiceFactory::BuildServiceInstanceFor(
+std::unique_ptr<KeyedService> WebDataServiceFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
   const base::FilePath& browser_state_path = context->GetStatePath();
-  return make_scoped_ptr(new WebDataServiceWrapper(
+  return base::WrapUnique(new WebDataServiceWrapper(
       browser_state_path, GetApplicationContext()->GetApplicationLocale(),
       web::WebThread::GetTaskRunnerForThread(web::WebThread::UI),
       web::WebThread::GetTaskRunnerForThread(web::WebThread::DB),
       ios::sync_start_util::GetFlareForSyncableService(browser_state_path),
       &DoNothingOnErrorCallback));
 }
 
 web::BrowserState* WebDataServiceFactory::GetBrowserStateToUse(
     web::BrowserState* context) const {
   return GetBrowserStateRedirectedInIncognito(context);
 }
 
 bool WebDataServiceFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 }  // namespace ios