Rename OS(WINDOWS) to OS(WIN)

Source/core/platform/audio/DenormalDisabler.h

 /*
  * Copyright (C) 2011, 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 15 matching lines @@
 #define DenormalDisabler_h
 
 #include "wtf/MathExtras.h"
 #include <float.h>
 
 namespace WebCore {
 
 // Deal with denormals. They can very seriously impact performance on x86.
 
 // Define HAVE_DENORMAL if we support flushing denormals to zero.
-#if OS(WINDOWS) && COMPILER(MSVC)
+#if OS(WIN) && COMPILER(MSVC)
 #define HAVE_DENORMAL
 #endif
 
 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 #define HAVE_DENORMAL
 #endif
 
 #ifdef HAVE_DENORMAL
 class DenormalDisabler {
 public:
     DenormalDisabler()
             : m_savedCSR(0)
     {
-#if OS(WINDOWS) && COMPILER(MSVC)
+#if OS(WIN) && COMPILER(MSVC)
         // Save the current state, and set mode to flush denormals.
         //
         // http://stackoverflow.com/questions/637175/possible-bug-in-controlfp-s-may-not-restore-control-word-correctly
         _controlfp_s(&m_savedCSR, 0, 0);
         unsigned int unused;
         _controlfp_s(&unused, _DN_FLUSH, _MCW_DN);
 #else
         m_savedCSR = getCSR();
         setCSR(m_savedCSR | 0x8040);
 #endif
     }
 
     ~DenormalDisabler()
     {
-#if OS(WINDOWS) && COMPILER(MSVC)
+#if OS(WIN) && COMPILER(MSVC)
         unsigned int unused;
         _controlfp_s(&unused, m_savedCSR, _MCW_DN);
 #else
         setCSR(m_savedCSR);
 #endif
     }
 
     // This is a nop if we can flush denormals to zero in hardware.
     static inline float flushDenormalFloatToZero(float f)
     {
-#if OS(WINDOWS) && COMPILER(MSVC) && (!_M_IX86_FP)
+#if OS(WIN) && COMPILER(MSVC) && (!_M_IX86_FP)
         // For systems using x87 instead of sse, there's no hardware support
         // to flush denormals automatically. Hence, we need to flush
         // denormals to zero manually.
         return (fabs(f) < FLT_MIN) ? 0.0f : f;
 #else
         return f;
 #endif
     }
 private:
 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
@@ skipping 28 matching lines @@
         return (fabs(f) < FLT_MIN) ? 0.0f : f;
     }
 };
 
 #endif
 
 } // WebCore
 
 #undef HAVE_DENORMAL
 #endif // DenormalDisabler_h