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diff --git a/Source/JavaScriptCore/API/JSCallbackFunction.cpp b/Source/JavaScriptCore/API/JSCallbackFunction.cpp
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+++ b/Source/JavaScriptCore/API/JSCallbackFunction.cpp
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+/*
+ * Copyright (C) 2006, 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
+ *    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 COMPUTER, 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 COMPUTER, 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. 
+ */
+
+#include "config.h"
+#include "JSCallbackFunction.h"
+
+#include "APIShims.h"
+#include "APICast.h"
+#include "CodeBlock.h"
+#include "ExceptionHelpers.h"
+#include "JSFunction.h"
+#include "FunctionPrototype.h"
+#include <runtime/JSGlobalObject.h>
+#include <runtime/JSLock.h>
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+ASSERT_CLASS_FITS_IN_CELL(JSCallbackFunction);
+
+const ClassInfo JSCallbackFunction::info = { "CallbackFunction", &InternalFunction::info, 0, 0 };
+
+JSCallbackFunction::JSCallbackFunction(ExecState* exec, JSGlobalObject* globalObject, JSObjectCallAsFunctionCallback callback, const Identifier& name)
+    : InternalFunction(&exec->globalData(), globalObject, globalObject->callbackFunctionStructure(), name)
+    , m_callback(callback)
+{
+}
+
+EncodedJSValue JSCallbackFunction::call(ExecState* exec)
+{
+    JSContextRef execRef = toRef(exec);
+    JSObjectRef functionRef = toRef(exec->callee());
+    JSObjectRef thisObjRef = toRef(exec->hostThisValue().toThisObject(exec));
+
+    int argumentCount = static_cast<int>(exec->argumentCount());
+    Vector<JSValueRef, 16> arguments(argumentCount);
+    for (int i = 0; i < argumentCount; i++)
+        arguments[i] = toRef(exec, exec->argument(i));
+
+    JSValueRef exception = 0;
+    JSValueRef result;
+    {
+        APICallbackShim callbackShim(exec);
+        result = static_cast<JSCallbackFunction*>(toJS(functionRef))->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
+    }
+    if (exception)
+        throwError(exec, toJS(exec, exception));
+
+    return JSValue::encode(toJS(exec, result));
+}
+
+CallType JSCallbackFunction::getCallData(CallData& callData)
+{
+    callData.native.function = call;
+    return CallTypeHost;
+}
+
+} // namespace JSC