Cleanup: Use default constructor for WebCryptoKey rather than createNull() factory method.

content/child/webcrypto/openssl/rsa_key_openssl.cc

 // 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.
 
 #include "content/child/webcrypto/openssl/rsa_key_openssl.h"
 
 #include <openssl/evp.h>
 #include <openssl/pkcs12.h>
 
 #include "base/logging.h"
@@ skipping 266 matching lines @@
   }
 
   // Construct an EVP_PKEY for the public key.
   crypto::ScopedRSA rsa_public_key(RSAPublicKey_dup(rsa_private_key.get()));
   crypto::ScopedEVP_PKEY public_pkey(EVP_PKEY_new());
   if (!public_pkey ||
       !EVP_PKEY_set1_RSA(public_pkey.get(), rsa_public_key.get())) {
     return Status::OperationError();
   }
 
-  blink::WebCryptoKey public_key = blink::WebCryptoKey::createNull();
-  blink::WebCryptoKey private_key = blink::WebCryptoKey::createNull();
+  blink::WebCryptoKey public_key;
+  blink::WebCryptoKey private_key;
 
   // Note that extractable is unconditionally set to true. This is because per
   // the WebCrypto spec generated public keys are always public.
   status = CreateWebCryptoPublicKey(public_pkey.Pass(),
                                     algorithm.id(),
                                     params->hash(),
                                     true,
                                     public_usage_mask,
                                     &public_key);
   if (status.IsError())
@@ skipping 202 matching lines @@
       return Status::Success();
 
     default:
       return Status::ErrorUnexpected();
   }
 }
 
 }  // namespace webcrypto
 
 }  // namespace content