Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/app_list/arc/arc_app_list_prefs_factory.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_LIST_PREFS_FACTORY_H_
 #define CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_LIST_PREFS_FACTORY_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 
 class ArcAppListPrefs;
 
 class ArcAppListPrefsFactory : public BrowserContextKeyedServiceFactory {
  public:
   static ArcAppListPrefs* GetForBrowserContext(
       content::BrowserContext* context);
 
   static ArcAppListPrefsFactory* GetInstance();
 
  private:
   friend struct base::DefaultSingletonTraits<ArcAppListPrefsFactory>;
 
   ArcAppListPrefsFactory();
   ~ArcAppListPrefsFactory() override;
 
   KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* context) const override;
   content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const override;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAppListPrefsFactory);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_LIST_PREFS_FACTORY_H_