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

chrome/browser/chromeos/settings/token_encryptor.h

 // Copyright 2013 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_SETTINGS_TOKEN_ENCRYPTOR_H_
 #define CHROME_BROWSER_CHROMEOS_SETTINGS_TOKEN_ENCRYPTOR_H_
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace crypto {
 class SymmetricKey;
 }
 
 namespace chromeos {
 
 // Interface class for classes that encrypt and decrypt tokens using the
 // system salt.
 class TokenEncryptor {
@@ skipping 37 matching lines @@
   std::string DecryptTokenWithKey(crypto::SymmetricKey* key,
                                   const std::string& salt,
                                   const std::string& encrypted_token_hex);
 
   // The cached system salt passed to the constructor, originally coming
   // from cryptohome daemon.
   std::string system_salt_;
 
   // A key based on the system salt.  Useful for encrypting device-level
   // data for which we have no additional credentials.
-  scoped_ptr<crypto::SymmetricKey> system_salt_key_;
+  std::unique_ptr<crypto::SymmetricKey> system_salt_key_;
 
   DISALLOW_COPY_AND_ASSIGN(CryptohomeTokenEncryptor);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SETTINGS_TOKEN_ENCRYPTOR_H_