Remove redundancies of multiply() in FFTFrame.

Source/platform/audio/mac/FFTFrameMac.cpp

 /*
  * 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
@@ skipping 80 matching lines @@
     // Copy/setup frame data
     unsigned nbytes = sizeof(float) * m_FFTSize;
     memcpy(realData(), frame.m_frame.realp, nbytes);
     memcpy(imagData(), frame.m_frame.imagp, nbytes);
 }
 
 FFTFrame::~FFTFrame()
 {
 }
 
-void FFTFrame::multiply(const FFTFrame& frame)
-{
-    FFTFrame& frame1 = *this;
-    const FFTFrame& frame2 = frame;
-
-    float* realP1 = frame1.realData();
-    float* imagP1 = frame1.imagData();
-    const float* realP2 = frame2.realData();
-    const float* imagP2 = frame2.imagData();
-
-    unsigned halfSize = m_FFTSize / 2;
-    float real0 = realP1[0];
-    float imag0 = imagP1[0];
-
-    // Complex multiply
-    VectorMath::zvmul(realP1, imagP1, realP2, imagP2, realP1, imagP1, halfSize);
-
-    // Multiply the packed DC/nyquist component
-    realP1[0] = real0 * realP2[0];
-    imagP1[0] = imag0 * imagP2[0];
-}
-
 void FFTFrame::doFFT(const float* data)
 {
     AudioFloatArray scaledData(m_FFTSize);
     // veclib fft returns a result that is twice as large as would be expected. Compensate for that
     // by scaling the input by half so the FFT has the correct scaling.
     float scale = 0.5f;
     VectorMath::vsmul(data, 1, &scale, scaledData.data(), 1, m_FFTSize);
 
     vDSP_ctoz((DSPComplex*)scaledData.data(), 2, &m_frame, 1, m_FFTSize / 2);
     vDSP_fft_zrip(m_FFTSetup, &m_frame, 1, m_log2FFTSize, FFT_FORWARD);
@@ skipping 50 matching lines @@
 float* FFTFrame::imagData() const
 {
     return m_frame.imagp;
 }
 
 } // namespace WebCore
 
 #endif // #if OS(MACOSX)
 
 #endif // ENABLE(WEB_AUDIO)