Shaving parallel authenticator yak to remove unnecessary dependency on this class from OAuth spec...

chrome/browser/chromeos/cros/cert_library.h

 // Copyright (c) 2011 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_CROS_CERT_LIBRARY_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_CERT_LIBRARY_H_
 #pragma once
 
 #include <string>
 
@@ skipping 83 matching lines @@
 
   // Returns the current list of user certificates.
   virtual const CertList& GetUserCertificates() const = 0;
 
   // Returns the current list of server certificates.
   virtual const CertList& GetServerCertificates() const = 0;
 
   // Returns the current list of server CA certificates.
   virtual const CertList& GetCACertificates() const = 0;
 
-  // Returns the supplemental user key.
-  virtual crypto::SymmetricKey* GetSupplementalUserKey() const = 0;
+  // Encrypts |token| with supplemental user key.
+  virtual std::string EncryptToken(const std::string& token) = 0;
+
+  // Decrypts |token| with supplemental user key.
+  virtual std::string DecryptToken(const std::string& encrypted_token) = 0;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_CERT_LIBRARY_H_