Use a forward declaration of RSAPrivateKey in crypto/signature_creator.h.

crypto/signature_creator_mac.cc

 // 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.
 
 #include "crypto/signature_creator.h"
 
 #include <stdlib.h>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "crypto/cssm_init.h"
+#include "crypto/rsa_private_key.h"
 
 namespace crypto {
 
 // static
 SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) {
   scoped_ptr<SignatureCreator> result(new SignatureCreator);
   result->key_ = key;
 
   CSSM_RETURN crtn;
   crtn = CSSM_CSP_CreateSignatureContext(GetSharedCSPHandle(),
@@ skipping 43 matching lines @@
   if (crtn) {
     NOTREACHED();
     return false;
   }
 
   signature->assign(sig->Data, sig->Data + sig->Length);
   return true;
 }
 
 }  // namespace crypto