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

crypto/mac_security_services_lock.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/mac_security_services_lock.h"
-
-#include "base/memory/singleton.h"
-#include "base/synchronization/lock.h"
-
-namespace {
-
-// This singleton pertains to Apple's wrappers over their own CSSM handles,
-// as opposed to our own CSSM_CSP_HANDLE in cssm_init.cc.
-class SecurityServicesSingleton {
- public:
-  static SecurityServicesSingleton* GetInstance() {
-    return Singleton<SecurityServicesSingleton,
-                     LeakySingletonTraits<SecurityServicesSingleton> >::get();
-  }
-
-  base::Lock& lock() { return lock_; }
-
- private:
-  friend struct DefaultSingletonTraits<SecurityServicesSingleton>;
-
-  SecurityServicesSingleton() {}
-  ~SecurityServicesSingleton() {}
-
-  base::Lock lock_;
-
-  DISALLOW_COPY_AND_ASSIGN(SecurityServicesSingleton);
-};
-
-}  // namespace
-
-namespace crypto {
-
-base::Lock& GetMacSecurityServicesLock() {
-  return SecurityServicesSingleton::GetInstance()->lock();
-}
-
-}  // namespace crypto