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diff --git a/WebCore/platform/audio/Biquad.h b/WebCore/platform/audio/Biquad.h
deleted file mode 100644
index d68bf4e..0000000
--- a/WebCore/platform/audio/Biquad.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * 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.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 Biquad_h
-#define Biquad_h
-
-#include "AudioArray.h"
-#include <sys/types.h>
-#include <wtf/Complex.h>
-#include <wtf/Platform.h>
- 
-namespace WebCore {
-
-// A basic biquad (two-zero / two-pole digital filter)
-//
-// It can be configured to a number of common and very useful filters:
-//    lowpass, highpass, shelving, parameteric, notch, allpass, ...
-
-class Biquad {
-public:   
-    Biquad();
-    virtual ~Biquad() { }
-
-    void process(const float* sourceP, float* destP, size_t framesToProcess);
-
-    // cutoff is 0-1 normalized, resonance is in dB >= 0.0
-    void setLowpassParams(double cutoff, double resonance);
-    void setHighpassParams(double cutoff, double resonance);
-
-    void setLowShelfParams(double cutoff, double dbGain);
-
-    // FIXME: need to implement a few more common filters
-    // void setHighShelfParams(double cutoff, double dbGain);
-    // void setParametricEQParams(double cutoff, double resonance);
-
-    // Set the biquad coefficients given a single zero (other zero will be conjugate)
-    // and a single pole (other pole will be conjugate)
-    void setZeroPolePairs(const Complex& zero, const Complex& pole);
-
-    // Set the biquad coefficients given a single pole (other pole will be conjugate)
-    // (The zeroes will be the inverse of the poles)
-    void setAllpassPole(const Complex& pole);
-
-    // Resets filter state
-    void reset();
-
-private:
-    // Filter coefficients
-    double m_a0;
-    double m_a1;
-    double m_a2;
-    double m_b1;
-    double m_b2;
-
-    double m_g;
-
-    // Filter memory
-    double m_x1; // input delayed by 1 sample
-    double m_x2; // input delayed by 2 samples
-    double m_y1; // output delayed by 1 sample
-    double m_y2; // output delayed by 2 samples
-
-#if OS(DARWIN)
-    void processFast(const float* sourceP, float* destP, size_t framesToProcess);
-    void processSliceFast(double* sourceP, double* destP, double* coefficientsP, size_t framesToProcess);
-
-    AudioDoubleArray m_inputBuffer;
-    AudioDoubleArray m_outputBuffer;
-#endif
-};
-
-} // namespace WebCore
-
-#endif // Biquad_h