NULL -> nullptr under athena/

athena/extensions/shell/shell_search_controller_factory.cc

 // Copyright 2014 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 "athena/extensions/shell/shell_search_controller_factory.h"
 
 #include "athena/extensions/shell/url_search_provider.h"
 #include "ui/app_list/search_controller.h"
 
 namespace athena {
 
 ShellSearchControllerFactory::ShellSearchControllerFactory(
     content::BrowserContext* browser_context)
     : browser_context_(browser_context) {
 }
 
 ShellSearchControllerFactory::~ShellSearchControllerFactory() {
 }
 
 scoped_ptr<app_list::SearchController> ShellSearchControllerFactory::Create(
     app_list::SearchBoxModel* search_box,
     app_list::AppListModel::SearchResults* results) {
   scoped_ptr<app_list::SearchController> controller(
       new app_list::SearchController(
-          search_box, results, NULL /* no history */));
+          search_box, results, nullptr /* no history */));
   controller->AddProvider(app_list::Mixer::MAIN_GROUP,
                           scoped_ptr<app_list::SearchProvider>(
                               new UrlSearchProvider(browser_context_)));
   return controller.Pass();
 }
 
 scoped_ptr<SearchControllerFactory> CreateSearchControllerFactory(
     content::BrowserContext* context) {
   return make_scoped_ptr(new ShellSearchControllerFactory(context));
 }
 
 }  // namespace athena