Update monet.

crypto/mac_security_services_lock.cc

Index: crypto/mac_security_services_lock.cc
diff --git a/crypto/mac_security_services_lock.cc b/crypto/mac_security_services_lock.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c0b8712089e9c76003ed2b47db7f7ba42fb1c052
--- /dev/null
+++ b/crypto/mac_security_services_lock.cc
@@ -0,0 +1,42 @@
+// 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