Remove duplicated headers from platform/

Source/platform/audio/HRTFKernel.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 15 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #if ENABLE(WEB_AUDIO)
 
 #include "platform/audio/HRTFKernel.h"
 
 #include "platform/audio/AudioChannel.h"
-#include "platform/audio/FFTFrame.h"
 #include "platform/FloatConversion.h"
 #include "wtf/MathExtras.h"
 
 using namespace std;
 
 namespace WebCore {
 
 // Takes the input AudioChannel as an input impulse response and calculates the average group delay.
 // This represents the initial delay before the most energetic part of the impulse response.
 // The sample-frame delay is removed from the impulseP impulse response, and this value  is returned.
@@ skipping 80 matching lines @@
 
     float frameDelay = (1 - x) * kernel1->frameDelay() + x * kernel2->frameDelay();
 
     OwnPtr<FFTFrame> interpolatedFrame = FFTFrame::createInterpolatedFrame(*kernel1->fftFrame(), *kernel2->fftFrame(), x);
     return HRTFKernel::create(interpolatedFrame.release(), frameDelay, sampleRate1);
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)