Make USE_OPENSSL and USE_NSS mutually exclusive

base/crypto/signature_creator_openssl.cc

+// Copyright (c) 2009 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 "base/crypto/signature_creator.h"
+
+#include "base/logging.h"
+
+namespace base {
+
+// static
+SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) {
+  return NULL;
+}
+
+SignatureCreator::SignatureCreator() {
+}
+
+SignatureCreator::~SignatureCreator() {
+}
+
+bool SignatureCreator::Update(const uint8* data_part, int data_part_len) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool SignatureCreator::Final(std::vector<uint8>* signature) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+}  // namespace base