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diff --git a/WebCore/html/canvas/WebGLArray.h b/WebCore/html/canvas/WebGLArray.h
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+++ b/WebCore/html/canvas/WebGLArray.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 WebGLArray_h
+#define WebGLArray_h
+
+#include "ExceptionCode.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+#include "WebGLArrayBuffer.h"
+
+namespace WebCore {
+
+class WebGLArray : public RefCounted<WebGLArray> {
+  public:
+    virtual bool isByteArray() const { return false; }
+    virtual bool isUnsignedByteArray() const { return false; }
+    virtual bool isShortArray() const { return false; }
+    virtual bool isUnsignedShortArray() const { return false; }
+    virtual bool isIntArray() const { return false; }
+    virtual bool isUnsignedIntArray() const { return false; }
+    virtual bool isFloatArray() const { return false; }
+
+    PassRefPtr<WebGLArrayBuffer> buffer() {
+        return m_buffer;
+    }
+
+    void* baseAddress() {
+        return m_baseAddress;
+    }
+
+    unsigned byteOffset() const {
+        return m_byteOffset;
+    }
+
+    virtual unsigned length() const = 0;
+    virtual unsigned byteLength() const = 0;
+    virtual PassRefPtr<WebGLArray> slice(unsigned offset, unsigned length) = 0;
+
+    virtual ~WebGLArray();
+
+  protected:
+    WebGLArray(PassRefPtr<WebGLArrayBuffer> buffer, unsigned byteOffset);
+
+    void setImpl(WebGLArray* array, unsigned byteOffset, ExceptionCode& ec);
+
+    // This is the address of the WebGLArrayBuffer's storage, plus the byte offset.
+    void* m_baseAddress;
+
+    unsigned m_byteOffset;
+
+  private:
+    RefPtr<WebGLArrayBuffer> m_buffer;
+};
+
+} // namespace WebCore
+
+#endif // WebGLArray_h