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

ios/web/public/web_controller_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 IOS_WEB_PUBLIC_WEB_CONTROLLER_FACTORY_H_
 #define IOS_WEB_PUBLIC_WEB_CONTROLLER_FACTORY_H_
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
 
 @class CRWWebController;
 
 namespace web {
 
 class BrowserState;
 class WebStateImpl;
 
 // Returns a new instance of CRWWebViewController.
 // Note: Callers are responsible for releasing the returned web controller.
-CRWWebController* CreateWebController(scoped_ptr<WebStateImpl> web_state);
+CRWWebController* CreateWebController(std::unique_ptr<WebStateImpl> web_state);
 
 // Returns a new instance of CRWWebViewController.
 // Temporary factory method for use in components that require a web controller.
 // By requiring only the BrowserState, this eliminates the dependency on
 // WebStateImpl from components.
 // Note: Callers are responsible for releasing the returned web controller.
 // TODO(crbug.com/546221): Move factory method to WebState once the ownership of
 // WebState and CRWWebController is reversed.
 CRWWebController* CreateWebController(BrowserState* browser_state);
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_WEB_CONTROLLER_FACTORY_H_