Use EVP_DigestSign* rather than EVP_Sign* in SignatureCreator.

crypto/signature_creator.h

 // Copyright (c) 2012 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 CRYPTO_SIGNATURE_CREATOR_H_
 #define CRYPTO_SIGNATURE_CREATOR_H_
 
 #include <vector>
 
 #include "build/build_config.h"
@@ skipping 41 matching lines @@
   // Update the signature with more data.
   bool Update(const uint8* data_part, int data_part_len);
 
   // Finalize the signature.
   bool Final(std::vector<uint8>* signature);
 
  private:
   // Private constructor. Use the Create() method instead.
   SignatureCreator();
 
-  RSAPrivateKey* key_;
-
 #if defined(USE_OPENSSL)
   EVP_MD_CTX* sign_context_;
 #elif defined(USE_NSS) || defined(OS_WIN) || defined(OS_MACOSX)
   SGNContextStr* sign_context_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(SignatureCreator);
 };
 
 }  // namespace crypto
 
 #endif  // CRYPTO_SIGNATURE_CREATOR_H_