Cheaper thread-safe atomic initialization of static references.

Source/modules/webdatabase/Database.cpp

 /*
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 121 matching lines @@
         WTF_LOG_ERROR("Failed to step statement to set value in database (%s)", query.ascii().data());
         return false;
     }
 
     return true;
 }
 
 // FIXME: move all guid-related functions to a DatabaseVersionTracker class.
 static RecursiveMutex& guidMutex()
 {
-    AtomicallyInitializedStatic(RecursiveMutex&, mutex = *new RecursiveMutex);
+    AtomicallyInitializedStaticReference(RecursiveMutex, mutex, new RecursiveMutex);
     return mutex;
 }
 
 typedef HashMap<DatabaseGuid, String> GuidVersionMap;
 static GuidVersionMap& guidToVersionMap()
 {
     // Ensure the the mutex is locked.
     ASSERT(guidMutex().locked());
     DEFINE_STATIC_LOCAL(GuidVersionMap, map, ());
     return map;
@@ skipping 767 matching lines @@
 SecurityOrigin* Database::securityOrigin() const
 {
     if (executionContext()->isContextThread())
         return m_contextThreadSecurityOrigin.get();
     if (databaseContext()->databaseThread()->isDatabaseThread())
         return m_databaseThreadSecurityOrigin.get();
     return 0;
 }
 
 } // namespace blink