Rename OS(DARWIN) to OS(MACOSX).

Source/core/platform/audio/VectorMath.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  */
 
 #include "config.h"
 
 #if ENABLE(WEB_AUDIO)
 
 #include "core/platform/audio/VectorMath.h"
 #include "wtf/Assertions.h"
 #include <stdint.h>
 
-#if OS(DARWIN)
+#if OS(MACOSX)
 #include <Accelerate/Accelerate.h>
 #endif
 
 #ifdef __SSE2__
 #include <emmintrin.h>
 #endif
 
 #if HAVE(ARM_NEON_INTRINSICS)
 #include <arm_neon.h>
 #endif
 
 #include <math.h>
 #include <algorithm>
 
 namespace WebCore {
 
 namespace VectorMath {
 
-#if OS(DARWIN)
+#if OS(MACOSX)
 // On the Mac we use the highly optimized versions in Accelerate.framework
 // In 32-bit mode (__ppc__ or __i386__) <Accelerate/Accelerate.h> includes <vecLib/vDSP_translate.h> which defines macros of the same name as
 // our namespaced function names, so we must handle this case differently. Other architectures (64bit, ARM, etc.) do not include this header file.
 
 void vsmul(const float* sourceP, int sourceStride, const float* scale, float* destP, int destStride, size_t framesToProcess)
 {
 #if defined(__ppc__) || defined(__i386__)
     ::vsmul(sourceP, sourceStride, scale, destP, destStride, framesToProcess);
 #else
     vDSP_vsmul(sourceP, sourceStride, scale, destP, destStride, framesToProcess);
@@ skipping 610 matching lines @@
         n = tailFrames;
     }
 #endif
     while (n--) {
         *destP = std::max(std::min(*sourceP, highThreshold), lowThreshold);
         sourceP += sourceStride;
         destP += destStride;
     }
 }
 
-#endif // OS(DARWIN)
+#endif // OS(MACOSX)
 
 } // namespace VectorMath
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)