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diff --git a/Source/JavaScriptCore/API/JSCallbackObject.cpp b/Source/JavaScriptCore/API/JSCallbackObject.cpp
new file mode 100644
index 000000000..ef9cb925c
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+++ b/Source/JavaScriptCore/API/JSCallbackObject.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
+ *
+ * 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 "JSCallbackObject.h"
+
+#include "Heap.h"
+#include <wtf/text/StringHash.h>
+
+namespace JSC {
+
+ASSERT_CLASS_FITS_IN_CELL(JSCallbackObject<JSNonFinalObject>);
+ASSERT_CLASS_FITS_IN_CELL(JSCallbackObject<JSGlobalObject>);
+
+// Define the two types of JSCallbackObjects we support.
+template <> const ClassInfo JSCallbackObject<JSNonFinalObject>::s_info = { "CallbackObject", &JSNonFinalObject::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackObject) };
+template <> const ClassInfo JSCallbackObject<JSGlobalObject>::s_info = { "CallbackGlobalObject", &JSGlobalObject::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackObject) };
+
+template <>
+Structure* JSCallbackObject<JSNonFinalObject>::createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto)
+{ 
+    return Structure::create(globalData, globalObject, proto, TypeInfo(ObjectType, StructureFlags), &s_info); 
+}
+    
+template <>
+Structure* JSCallbackObject<JSGlobalObject>::createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto)
+{ 
+    return Structure::create(globalData, globalObject, proto, TypeInfo(GlobalObjectType, StructureFlags), &s_info); 
+}
+
+template <class Parent>
+void JSCallbackObject<Parent>::destroy(JSCell* cell)
+{
+    jsCast<JSCallbackObject*>(cell)->JSCallbackObject::~JSCallbackObject();
+}
+
+void JSCallbackObjectData::finalize(Handle<Unknown> handle, void* context)
+{
+    JSClassRef jsClass = static_cast<JSClassRef>(context);
+    JSObjectRef thisRef = toRef(asObject(handle.get()));
+    
+    for (; jsClass; jsClass = jsClass->parentClass)
+        if (JSObjectFinalizeCallback finalize = jsClass->finalize)
+            finalize(thisRef);
+    HandleSlot slot = handle.slot();
+    HandleHeap::heapFor(slot)->deallocate(slot);
+}
+    
+} // namespace JSC