Remove duplicated headers from platform/

Source/platform/audio/HRTFElevation.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 18 matching lines @@
 #include "config.h"
 
 #if ENABLE(WEB_AUDIO)
 
 #include "platform/audio/HRTFElevation.h"
 
 #include <math.h>
 #include <algorithm>
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/HRTFPanner.h"
-#include "wtf/OwnPtr.h"
 #include "wtf/ThreadingPrimitives.h"
 #include "wtf/text/StringHash.h"
 
 using namespace std;
 
 namespace WebCore {
 
 const unsigned HRTFElevation::AzimuthSpacing = 15;
 const unsigned HRTFElevation::NumberOfRawAzimuths = 360 / AzimuthSpacing;
 const unsigned HRTFElevation::InterpolationFactor = 8;
@@ skipping 284 matching lines @@
     double frameDelay2R = m_kernelListR->at(azimuthIndex2)->frameDelay();
 
     // Linearly interpolate delays.
     frameDelayL = (1.0 - azimuthBlend) * frameDelayL + azimuthBlend * frameDelay2L;
     frameDelayR = (1.0 - azimuthBlend) * frameDelayR + azimuthBlend * frameDelay2R;
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)