Fix client certificate authentication on Mac and Linux introduced in r178732

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_