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diff --git a/Source/JavaScriptCore/runtime/JSDataView.h b/Source/JavaScriptCore/runtime/JSDataView.h
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+++ b/Source/JavaScriptCore/runtime/JSDataView.h
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+/*
+ * Copyright (C) 2013-2015 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 JSDataView_h
+#define JSDataView_h
+
+#include "DataView.h"
+#include "JSArrayBufferView.h"
+
+namespace JSC {
+
+class JSDataView : public JSArrayBufferView {
+public:
+    typedef JSArrayBufferView Base;
+    static const unsigned elementSize = 1;
+    
+protected:
+    JSDataView(VM&, ConstructionContext&, ArrayBuffer*);
+    
+public:
+    static JSDataView* create(
+        ExecState*, Structure*, PassRefPtr<ArrayBuffer>, unsigned byteOffset,
+        unsigned byteLength);
+    
+    // Dummy methods, which don't actually work; these are just in place to
+    // placate some template specialization we do elsewhere.
+    static JSDataView* createUninitialized(ExecState*, Structure*, unsigned length);
+    static JSDataView* create(ExecState*, Structure*, unsigned length);
+    bool set(ExecState*, JSObject*, unsigned offset, unsigned length);
+    bool setIndex(ExecState*, unsigned, JSValue);
+    
+    ArrayBuffer* buffer() const { return m_buffer; }
+    
+    PassRefPtr<DataView> typedImpl();
+    
+    static const TypedArrayType TypedArrayStorageType = TypeDataView;
+
+protected:
+    static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
+    static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
+    static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
+    static bool deleteProperty(JSCell*, ExecState*, PropertyName);
+
+    static void getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
+
+    static ArrayBuffer* slowDownAndWasteMemory(JSArrayBufferView*);
+    static PassRefPtr<ArrayBufferView> getTypedArrayImpl(JSArrayBufferView*);
+    
+public:
+    static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
+    
+    DECLARE_EXPORT_INFO;
+
+private:
+    ArrayBuffer* m_buffer;
+};
+
+} // namespace JSC
+
+#endif // JSDataView_h
+