Change SecurityOrigin from ThreadSafeRefCounted to RefCounted

Source/platform/weborigin/SecurityOrigin.h

 /*
  * Copyright (C) 2007, 2008 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
@@ skipping 20 matching lines @@
 
 #include "platform/PlatformExport.h"
 #include "wtf/ThreadSafeRefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class KURL;
 class SecurityOriginCache;
 
-class PLATFORM_EXPORT SecurityOrigin : public ThreadSafeRefCounted<SecurityOrigin> {
+class PLATFORM_EXPORT SecurityOrigin : public RefCounted<SecurityOrigin> {
 public:
     enum Policy {
         AlwaysDeny = 0,
         AlwaysAllow,
         Ask
     };
 
     static PassRefPtr<SecurityOrigin> create(const KURL&);
     static PassRefPtr<SecurityOrigin> createUnique();
 
@@ skipping 180 matching lines @@
     bool m_universalAccess;
     bool m_domainWasSetInDOM;
     bool m_canLoadLocalResources;
     bool m_enforceFilePathSeparation;
     bool m_needsDatabaseIdentifierQuirkForFiles;
 };
 
 } // namespace blink
 
 #endif // SecurityOrigin_h