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diff --git a/Source/JavaScriptCore/runtime/JSFunction.h b/Source/JavaScriptCore/runtime/JSFunction.h
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+/*
+ *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+ *  Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
+ *  Copyright (C) 2007 Maks Orlovich
+ *
+ *  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 JSFunction_h
+#define JSFunction_h
+
+#include "JSObjectWithGlobalObject.h"
+
+namespace JSC {
+
+    class ExecutableBase;
+    class FunctionExecutable;
+    class FunctionPrototype;
+    class JSActivation;
+    class JSGlobalObject;
+    class NativeExecutable;
+
+    EncodedJSValue JSC_HOST_CALL callHostFunctionAsConstructor(ExecState*);
+
+    class JSFunction : public JSObjectWithGlobalObject {
+        friend class JIT;
+        friend class JSGlobalData;
+
+        typedef JSObjectWithGlobalObject Base;
+
+    public:
+        JSFunction(ExecState*, JSGlobalObject*, NonNullPassRefPtr<Structure>, int length, const Identifier&, NativeFunction);
+#if ENABLE(JIT)
+        JSFunction(ExecState*, JSGlobalObject*, NonNullPassRefPtr<Structure>, int length, const Identifier&, PassRefPtr<NativeExecutable>);
+#endif
+        JSFunction(ExecState*, NonNullPassRefPtr<FunctionExecutable>, ScopeChainNode*);
+        virtual ~JSFunction();
+
+        const UString& name(ExecState*);
+        const UString displayName(ExecState*);
+        const UString calculatedDisplayName(ExecState*);
+
+        ScopeChain& scope()
+        {
+            ASSERT(!isHostFunctionNonInline());
+            return m_scopeChain;
+        }
+        void setScope(const ScopeChain& scopeChain)
+        {
+            ASSERT(!isHostFunctionNonInline());
+            m_scopeChain = scopeChain;
+        }
+
+        ExecutableBase* executable() const { return m_executable.get(); }
+
+        // To call either of these methods include Executable.h
+        inline bool isHostFunction() const;
+        FunctionExecutable* jsExecutable() const;
+
+        static JS_EXPORTDATA const ClassInfo info;
+
+        static PassRefPtr<Structure> createStructure(JSValue prototype) 
+        { 
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount); 
+        }
+
+        NativeFunction nativeFunction();
+
+        virtual ConstructType getConstructData(ConstructData&);
+        virtual CallType getCallData(CallData&);
+
+    protected:
+        const static unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags;
+
+    private:
+        JSFunction(NonNullPassRefPtr<Structure>);
+
+        bool isHostFunctionNonInline() const;
+
+        virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
+        virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
+        virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+
+        virtual void markChildren(MarkStack&);
+
+        virtual const ClassInfo* classInfo() const { return &info; }
+
+        static JSValue argumentsGetter(ExecState*, JSValue, const Identifier&);
+        static JSValue callerGetter(ExecState*, JSValue, const Identifier&);
+        static JSValue lengthGetter(ExecState*, JSValue, const Identifier&);
+
+        RefPtr<ExecutableBase> m_executable;
+        ScopeChain m_scopeChain;
+    };
+
+    JSFunction* asFunction(JSValue);
+
+    inline JSFunction* asFunction(JSValue value)
+    {
+        ASSERT(asObject(value)->inherits(&JSFunction::info));
+        return static_cast<JSFunction*>(asObject(value));
+    }
+
+} // namespace JSC
+
+#endif // JSFunction_h