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diff --git a/Source/JavaScriptCore/runtime/JSBoundFunction.h b/Source/JavaScriptCore/runtime/JSBoundFunction.h
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+++ b/Source/JavaScriptCore/runtime/JSBoundFunction.h
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+/*
+ * Copyright (C) 2011 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
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef JSBoundFunction_h
+#define JSBoundFunction_h
+
+#include "JSFunction.h"
+
+namespace JSC {
+
+EncodedJSValue JSC_HOST_CALL boundFunctionCall(ExecState*);
+EncodedJSValue JSC_HOST_CALL boundFunctionConstruct(ExecState*);
+
+class JSBoundFunction : public JSFunction {
+public:
+    typedef JSFunction Base;
+
+    static JSBoundFunction* create(ExecState*, JSGlobalObject*, JSObject* targetFunction, JSValue boundThis, JSValue boundArgs, int, const Identifier&);
+
+    static bool hasInstance(JSObject*, ExecState*, JSValue, JSValue proto);
+
+    JSObject* targetFunction() { return m_targetFunction.get(); }
+    JSValue boundThis() { return m_boundThis.get(); }
+    JSValue boundArgs() { return m_boundArgs.get(); }
+
+    static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue prototype) 
+    {
+        ASSERT(globalObject);
+        return Structure::create(globalData, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), &s_info); 
+    }
+
+    static JS_EXPORTDATA const ClassInfo s_info;
+
+protected:
+    const static unsigned StructureFlags = OverridesHasInstance | OverridesVisitChildren | Base::StructureFlags;
+
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+private:
+    JSBoundFunction(ExecState*, JSGlobalObject*, Structure*, JSObject* targetFunction, JSValue boundThis, JSValue boundArgs);
+    
+    void finishCreation(ExecState*, NativeExecutable*, int, const Identifier&);
+
+    WriteBarrier<JSObject> m_targetFunction;
+    WriteBarrier<Unknown> m_boundThis;
+    WriteBarrier<Unknown> m_boundArgs;
+};
+
+} // namespace JSC
+
+#endif // JSFunction_h