Rename OS(WINDOWS) to OS(WIN)

Source/wtf/NumberOfCores.cpp

 /*
  * Copyright (C) 2012 University of Szeged. 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 16 matching lines @@
 #include "NumberOfCores.h"
 
 #if OS(MACOSX) || OS(OPENBSD) || OS(NETBSD) || OS(FREEBSD)
 #include <sys/param.h>
 // sys/types.h must come before sys/sysctl.h because the latter uses
 // data types defined in the former. See sysctl(3) and style(9).
 #include <sys/types.h>
 #include <sys/sysctl.h>
 #elif OS(LINUX)
 #include <unistd.h>
-#elif OS(WINDOWS)
+#elif OS(WIN)
 #include "wtf/UnusedParam.h"
 #include <windows.h>
 #endif
 
 namespace WTF {
 
 int numberOfProcessorCores()
 {
     const int defaultIfUnavailable = 1;
     static int s_numberOfCores = -1;
 
     if (s_numberOfCores > 0)
         return s_numberOfCores;
 
 #if OS(MACOSX) || OS(OPENBSD) || OS(NETBSD) || OS(FREEBSD)
     unsigned result;
     size_t length = sizeof(result);
     int name[] = {
             CTL_HW,
             HW_NCPU
     };
     int sysctlResult = sysctl(name, sizeof(name) / sizeof(int), &result, &length, 0, 0);
 
     s_numberOfCores = sysctlResult < 0 ? defaultIfUnavailable : result;
 #elif OS(LINUX)
     long sysconfResult = sysconf(_SC_NPROCESSORS_ONLN);
 
     s_numberOfCores = sysconfResult < 0 ? defaultIfUnavailable : static_cast<int>(sysconfResult);
-#elif OS(WINDOWS)
+#elif OS(WIN)
     UNUSED_PARAM(defaultIfUnavailable);
     SYSTEM_INFO sysInfo;
     GetSystemInfo(&sysInfo);
 
     s_numberOfCores = sysInfo.dwNumberOfProcessors;
 #else
     s_numberOfCores = defaultIfUnavailable;
 #endif
     return s_numberOfCores;
 }
 
 }