Rename OS(UNIX) to OS(POSIX)

Source/wtf/ByteOrder.h

 /*
 * Copyright (C) 2012 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 #ifndef WTF_ByteOrder_h
 #define WTF_ByteOrder_h
 
 #include "wtf/CPU.h"
 
-#if OS(UNIX)
+#if OS(POSIX)
 #include <arpa/inet.h>
 #endif
 
 #if OS(WIN)
 
 namespace WTF {
 inline uint32_t wswap32(uint32_t x) { return ((x & 0xffff0000) >> 16) | ((x & 0x0000ffff) << 16); }
 inline uint32_t bswap32(uint32_t x) { return ((x & 0xff000000) >> 24) | ((x & 0x00ff0000) >> 8) | ((x & 0x0000ff00) << 8) | ((x & 0x000000ff) << 24); }
 inline uint16_t bswap16(uint16_t x) { return ((x & 0xff00) >> 8) | ((x & 0x00ff) << 8); }
 } // namespace WTF
@@ skipping 11 matching lines @@
 #else
 inline uint16_t ntohs(uint16_t x) { return WTF::bswap16(x); }
 inline uint16_t htons(uint16_t x) { return WTF::bswap16(x); }
 inline uint32_t ntohl(uint32_t x) { return WTF::bswap32(x); }
 inline uint32_t htonl(uint32_t x) { return WTF::bswap32(x); }
 #endif
 
 #endif // OS(WIN)
 
 #endif // WTF_ByteOrder_h