Move crypto files out of base, to a top level directory.

crypto/mac_security_services_lock.h

+// 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.
+
+#ifndef CRYPTO_MAC_SECURITY_SERVICES_LOCK_H_
+#define CRYPTO_MAC_SECURITY_SERVICES_LOCK_H_
+#pragma once
+
+namespace base {
+class Lock;
+}
+
+
+namespace crypto {
+
+// The Mac OS X certificate and key management wrappers over CSSM are not
+// thread-safe. In particular, code that accesses the CSSM database is
+// problematic.
+//
+// http://developer.apple.com/mac/library/documentation/Security/Reference/certifkeytrustservices/Reference/reference.html
+base::Lock& GetMacSecurityServicesLock();
+
+}  // namespace crypto
+
+#endif  // CRYPTO_MAC_SECURITY_SERVICES_LOCK_H_