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diff --git a/Source/JavaScriptCore/runtime/ClassInfo.h b/Source/JavaScriptCore/runtime/ClassInfo.h
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+/*
+ *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
+ *  Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef ClassInfo_h
+#define ClassInfo_h
+
+#include "CallFrame.h"
+
+namespace JSC {
+
+    class HashEntry;
+    struct HashTable;
+
+    struct ClassInfo {
+        /**
+         * A string denoting the class name. Example: "Window".
+         */
+        const char* className;
+
+        /**
+         * Pointer to the class information of the base class.
+         * 0L if there is none.
+         */
+        const ClassInfo* parentClass;
+        /**
+         * Static hash-table of properties.
+         * For classes that can be used from multiple threads, it is accessed via a getter function that would typically return a pointer to thread-specific value.
+         */
+        const HashTable* propHashTable(ExecState* exec) const
+        {
+            if (classPropHashTableGetterFunction)
+                return classPropHashTableGetterFunction(exec);
+            return staticPropHashTable;
+        }
+
+        const HashTable* staticPropHashTable;
+        typedef const HashTable* (*ClassPropHashTableGetterFunction)(ExecState*);
+        const ClassPropHashTableGetterFunction classPropHashTableGetterFunction;
+    };
+
+} // namespace JSC
+
+#endif // ClassInfo_h