Fix crypto_unittests on Windows BoringSSL port.

crypto/signature_creator_openssl.cc

 // 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.
 
 #include "crypto/signature_creator.h"
 
 #include <openssl/evp.h>
 #include <openssl/rsa.h>
 
 #include "base/logging.h"
@@ skipping 50 matching lines @@
                             HashAlgorithm hash_alg,
                             const uint8* data,
                             int data_len,
                             std::vector<uint8>* signature) {
   ScopedRSA rsa_key(EVP_PKEY_get1_RSA(key->key()));
   if (!rsa_key)
     return false;
   signature->resize(RSA_size(rsa_key.get()));
 
   unsigned int len = 0;
-  bool success = RSA_sign(ToOpenSSLDigestType(hash_alg), data, data_len,
-                          vector_as_array(signature), &len, rsa_key.get());
-  if (!success) {
+  if (!RSA_sign(ToOpenSSLDigestType(hash_alg), data, data_len,
+                vector_as_array(signature), &len, rsa_key.get())) {
     signature->clear();
     return false;
   }
   signature->resize(len);
   return true;
 }
 
 SignatureCreator::SignatureCreator()
     : sign_context_(EVP_MD_CTX_create()) {
 }
@@ skipping 16 matching lines @@
   int rv = EVP_SignFinal(sign_context_, vector_as_array(signature), &len, key);
   if (!rv) {
     signature->clear();
     return false;
   }
   signature->resize(len);
   return true;
 }
 
 }  // namespace crypto