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diff --git a/WebCore/html/canvas/WebGLShortArray.h b/WebCore/html/canvas/WebGLShortArray.h
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+++ b/WebCore/html/canvas/WebGLShortArray.h
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+/*
+ * Copyright (C) 2009 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. 
+ */
+
+#ifndef WebGLShortArray_h
+#define WebGLShortArray_h
+
+#include "WebGLArray.h"
+#include <limits>
+#include <wtf/MathExtras.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+class WebGLShortArray : public WebGLArray {
+  public:
+    virtual bool isShortArray() const { return true; }
+
+    static PassRefPtr<WebGLShortArray> create(unsigned length);
+    static PassRefPtr<WebGLShortArray> create(short* array, unsigned length);
+    static PassRefPtr<WebGLShortArray> create(PassRefPtr<WebGLArrayBuffer> buffer, int byteOffset, unsigned length);
+
+    short* data() { return static_cast<short*>(baseAddress()); }
+
+    virtual unsigned length() const;
+    virtual unsigned byteLength() const;
+    virtual PassRefPtr<WebGLArray> slice(unsigned offset, unsigned length);
+
+    void set(unsigned index, double value)
+    {
+        if (index >= m_size)
+            return;
+        if (isnan(value)) // Clamp NaN to 0
+            value = 0;
+        if (value < std::numeric_limits<short>::min())
+            value = std::numeric_limits<short>::min();
+        else if (value > std::numeric_limits<short>::max())
+            value = std::numeric_limits<short>::max();
+        short* storage = static_cast<short*>(m_baseAddress);
+        storage[index] = static_cast<short>(value);
+    }
+
+    bool get(unsigned index, short& result) const
+    {
+        if (index >= m_size)
+            return false;
+        result = item(index);
+        return true;
+    }
+
+    short get(unsigned index) const
+    {
+        return item(index);
+    }
+
+    short item(unsigned index) const
+    {
+        ASSERT(index < m_size);
+        short* storage = static_cast<short*>(m_baseAddress);
+        return storage[index];
+    }
+
+    void set(WebGLShortArray* array, unsigned offset, ExceptionCode& ec);
+
+  private:
+    WebGLShortArray(PassRefPtr<WebGLArrayBuffer> buffer, int byteOffset, unsigned length);
+    unsigned m_size;
+};
+
+} // namespace WebCore
+
+#endif // WebGLShortArray_h