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diff --git a/Source/JavaScriptCore/runtime/JSNativeStdFunction.h b/Source/JavaScriptCore/runtime/JSNativeStdFunction.h
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+++ b/Source/JavaScriptCore/runtime/JSNativeStdFunction.h
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+/*
+ * Copyright (C) 2015 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 JSNativeStdFunction_h
+#define JSNativeStdFunction_h
+
+#include "JSFunction.h"
+
+namespace JSC {
+
+class JSGlobalObject;
+class NativeStdFunctionCell;
+
+typedef std::function<EncodedJSValue (ExecState*)> NativeStdFunction;
+
+class JSNativeStdFunction : public JSFunction {
+public:
+    typedef JSFunction Base;
+
+    const static unsigned StructureFlags = Base::StructureFlags;
+
+    DECLARE_EXPORT_INFO;
+
+    JS_EXPORT_PRIVATE static JSNativeStdFunction* create(VM&, JSGlobalObject*, int length, const String& name, NativeStdFunction&&, Intrinsic = NoIntrinsic, NativeFunction nativeConstructor = callHostFunctionAsConstructor);
+
+    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+    {
+        ASSERT(globalObject);
+        return Structure::create(vm, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), info());
+    }
+
+    NativeStdFunctionCell* nativeStdFunctionCell() { return m_functionCell.get(); }
+
+protected:
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+    void finishCreation(VM&, NativeExecutable*, int length, const String& name, NativeStdFunctionCell*);
+
+private:
+    JSNativeStdFunction(VM&, JSGlobalObject*, Structure*);
+
+    WriteBarrier<NativeStdFunctionCell> m_functionCell;
+};
+
+} // namespace JSC
+
+#endif // JSNativeStdFunction_h