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

chrome/browser/chromeos/login/users/supervised_user_manager_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_USERS_SUPERVISED_USER_MANAGER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_SUPERVISED_USER_MANAGER_IMPL_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 89 matching lines @@
                            const bool value);
 
   void CleanPref(const std::string& user_id,
                  const char* key);
 
   ChromeUserManagerImpl* owner_;
 
   // Interface to the signed settings store.
   CrosSettings* cros_settings_;
 
-  scoped_ptr<SupervisedUserAuthentication> authentication_;
+  std::unique_ptr<SupervisedUserAuthentication> authentication_;
 
   DISALLOW_COPY_AND_ASSIGN(SupervisedUserManagerImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_SUPERVISED_USER_MANAGER_IMPL_H_