Rename OS(DARWIN) to OS(MACOSX).

Source/core/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 14 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // Mac OS X - specific FFTFrame implementation
 
 #include "config.h"
 
 #if ENABLE(WEB_AUDIO)
 
-#if OS(DARWIN) && !USE(WEBAUDIO_FFMPEG)
+#if OS(MACOSX) && !USE(WEBAUDIO_FFMPEG)
 
 #include "core/platform/audio/FFTFrame.h"
 
 #include "core/platform/audio/VectorMath.h"
 
 namespace WebCore {
 
 const int kMaxFFTPow2Size = 24;
 
 FFTSetup* FFTFrame::fftSetups = 0;
@@ skipping 135 matching lines @@
     return m_frame.realp;
 }
 
 float* FFTFrame::imagData() const
 {
     return m_frame.imagp;
 }
 
 } // namespace WebCore
 
-#endif // #if OS(DARWIN) && !USE(WEBAUDIO_FFMPEG)
+#endif // #if OS(MACOSX) && !USE(WEBAUDIO_FFMPEG)
 
 #endif // ENABLE(WEB_AUDIO)