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diff --git a/WebCore/html/canvas/FloatArray.h b/WebCore/html/canvas/FloatArray.h
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+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2009 Google 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 FloatArray_h
+#define FloatArray_h
+
+#include "TypedArrayBase.h"
+#include <wtf/MathExtras.h>
+
+namespace WebCore {
+
+class FloatArray : public TypedArrayBase<float> {
+  public:
+    static PassRefPtr<FloatArray> create(unsigned length);
+    static PassRefPtr<FloatArray> create(float* array, unsigned length);
+    static PassRefPtr<FloatArray> create(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length);
+
+    using TypedArrayBase<float>::set;
+
+    void set(unsigned index, double value)
+    {
+        if (index >= TypedArrayBase<float>::m_length)
+            return;
+        if (isnan(value)) // Clamp NaN to 0
+            value = 0;
+        TypedArrayBase<float>::data()[index] = static_cast<float>(value);
+    }
+
+    // Invoked by the indexed getter. Does not perform range checks; caller
+    // is responsible for doing so and returning undefined as necessary.
+    float item(unsigned index) const
+    {
+        ASSERT(index < TypedArrayBase<float>::m_length);
+        float result = TypedArrayBase<float>::data()[index];
+        if (isnan(result)) {
+            // Clamp NaN to 0
+            result = 0;
+        }
+        return result;
+    }
+
+  private:
+    FloatArray(PassRefPtr<ArrayBuffer> buffer,
+                    unsigned byteOffset,
+                    unsigned length);
+    // Make constructor visible to superclass.
+    friend class TypedArrayBase<float>;
+
+    // Overridden from ArrayBufferView.
+    virtual bool isFloatArray() const { return true; }
+    virtual PassRefPtr<ArrayBufferView> slice(int start, int end) const;
+};
+
+} // namespace WebCore
+
+#endif // FloatArray_h