Rename OS(DARWIN) to OS(MACOSX).

Source/core/platform/audio/Reverb.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 22 matching lines @@
 #include "core/platform/audio/Reverb.h"
 
 #include <math.h>
 #include "core/platform/audio/AudioBus.h"
 #include "core/platform/audio/ReverbConvolver.h"
 #include "core/platform/audio/VectorMath.h"
 #include "wtf/MathExtras.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
-#if OS(DARWIN)
+#if OS(MACOSX)
 using namespace std;
 #endif
 
 namespace WebCore {
 
 using namespace VectorMath;
 
 // Empirical gain calibration tested across many impulse responses to ensure perceived volume is same as dry (unprocessed) signal
 const float GainCalibration = -58;
 const float GainCalibrationSampleRate = 44100;
@@ skipping 179 matching lines @@
 }
 
 size_t Reverb::latencyFrames() const
 {
     return !m_convolvers.isEmpty() ? m_convolvers.first()->latencyFrames() : 0;
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)