include RefCounted.h where needed, only.

third_party/WebKit/Source/platform/audio/HRTFKernel.h

 /*
  * 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 16 matching lines @@
  */
 
 #ifndef HRTFKernel_h
 #define HRTFKernel_h
 
 #include "platform/audio/FFTFrame.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class AudioChannel;
 
 // HRTF stands for Head-Related Transfer Function.
 // HRTFKernel is a frequency-domain representation of an impulse-response used as part of the spatialized panning system.
 // For a given azimuth / elevation angle there will be one HRTFKernel for the left ear transfer function, and one for the right ear.
 // The leading delay (average group delay) for each impulse response is extracted:
@@ skipping 43 matching lines @@
     OwnPtr<FFTFrame> m_fftFrame;
     float m_frameDelay;
     float m_sampleRate;
 };
 
 typedef Vector<OwnPtr<HRTFKernel>> HRTFKernelList;
 
 } // namespace blink
 
 #endif // HRTFKernel_h