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

chrome/browser/chromeos/login/users/mock_user_manager.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_MOCK_USER_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_MOCK_USER_MANAGER_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
@@ skipping 150 matching lines @@
   void AddUser(const AccountId& account_id);
 
   // The same as AddUser, but allows specifying affiliation with the domain,
   // that owns the device.
   void AddUserWithAffiliation(const AccountId& account_id, bool is_affiliated);
 
   // Clears the user list and the active user. Users previously created by this
   // MockUserManager become invalid.
   void ClearUserList();
 
-  scoped_ptr<UserFlow> user_flow_;
-  scoped_ptr<MockUserImageManager> user_image_manager_;
-  scoped_ptr<FakeSupervisedUserManager> supervised_user_manager_;
+  std::unique_ptr<UserFlow> user_flow_;
+  std::unique_ptr<MockUserImageManager> user_image_manager_;
+  std::unique_ptr<FakeSupervisedUserManager> supervised_user_manager_;
   user_manager::UserList user_list_;
   // TODO (alemate): remove temporary_owner_account_id_ as soon as
   // User::GetAccountId will
   // return constant reference. crbug.com/546863
   mutable AccountId temporary_owner_account_id_ = EmptyAccountId();
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_MOCK_USER_MANAGER_H_