Reland "Cut down /crypto and switch what is left of it to boringssl".

crypto/mac_security_services_lock.h

-// 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.
-
-#ifndef CRYPTO_MAC_SECURITY_SERVICES_LOCK_H_
-#define CRYPTO_MAC_SECURITY_SERVICES_LOCK_H_
-
-#include "crypto/crypto_export.h"
-
-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
-CRYPTO_EXPORT base::Lock& GetMacSecurityServicesLock();
-
-}  // namespace crypto
-
-#endif  // CRYPTO_MAC_SECURITY_SERVICES_LOCK_H_