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diff --git a/WebCore/webaudio/LowPass2FilterNode.h b/WebCore/webaudio/LowPass2FilterNode.h
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+++ b/WebCore/webaudio/LowPass2FilterNode.h
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+/*
+ * Copyright (C) 2010, 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 INC. AND ITS CONTRIBUTORS ``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 ITS 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 LowPass2FilterNode_h
+#define LowPass2FilterNode_h
+
+#include "AudioBasicProcessorNode.h"
+#include "BiquadProcessor.h"
+
+namespace WebCore {
+
+class AudioParam;
+    
+class LowPass2FilterNode : public AudioBasicProcessorNode {
+public:
+    static PassRefPtr<LowPass2FilterNode> create(AudioContext* context, double sampleRate)
+    {
+        return adoptRef(new LowPass2FilterNode(context, sampleRate));      
+    }
+
+    AudioParam* cutoff() { return biquadProcessor()->parameter1(); }
+    AudioParam* resonance() { return biquadProcessor()->parameter2(); }
+    
+private:
+    LowPass2FilterNode(AudioContext*, double sampleRate);
+
+    BiquadProcessor* biquadProcessor() { return static_cast<BiquadProcessor*>(processor()); }
+};
+
+} // namespace WebCore
+
+#endif // LowPass2FilterNode_h