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

chrome/browser/chromeos/login/easy_unlock/easy_unlock_create_keys_operation.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_EASY_UNLOCK_EASY_UNLOCK_CREATE_KEYS_OPERATION_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_EASY_UNLOCK_EASY_UNLOCK_CREATE_KEYS_OPERATION_H_
 
 #include <stddef.h>
 
+#include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/login/easy_unlock/easy_unlock_types.h"
 #include "chromeos/login/auth/user_context.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace chromeos {
 
 class UserContext;
 
 // A class to create Easy unlock cryptohome keys for the given user and devices.
@@ skipping 26 matching lines @@
                     cryptohome::MountError return_code);
 
   UserContext user_context_;
   std::string tpm_public_key_;
   EasyUnlockDeviceKeyDataList devices_;
   CreateKeysCallback callback_;
 
   // Index of the key to be created.
   size_t key_creation_index_;
 
-  scoped_ptr<ChallengeCreator> challenge_creator_;
+  std::unique_ptr<ChallengeCreator> challenge_creator_;
 
   base::WeakPtrFactory<EasyUnlockCreateKeysOperation> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockCreateKeysOperation);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_EASY_UNLOCK_EASY_UNLOCK_CREATE_KEYS_OPERATION_H_