Remove OS(WINCE) as blink and chromium does not support WinCe.

Source/wtf/DataLog.cpp

 /*
  * Copyright (C) 2012 Apple 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 16 matching lines @@
 #include "DataLog.h"
 #include <stdarg.h>
 #include <wtf/FilePrintStream.h>
 #include <wtf/WTFThreadData.h>
 #include <wtf/Threading.h>
 
 #if OS(UNIX)
 #include <unistd.h>
 #endif
 
-#if OS(WINCE)
-#ifndef _IONBF
-#define _IONBF 0x0004
-#endif
-#endif
-
 #define DATA_LOG_TO_FILE 0
 
 // Uncomment to force logging to the given file regardless of what the environment variable says. Note that
 // we will append ".<pid>.txt" where <pid> is the PID.
 
 // This path won't work on Windows, make sure to change to something like C:\\Users\\<more path>\\log.txt.
 #define DATA_LOG_FILENAME "/tmp/WTFLog"
 
 namespace WTF {
 
@@ skipping 56 matching lines @@
     va_end(argList);
 }
 
 void dataLogFString(const char* str)
 {
     dataFile().printf("%s", str);
 }
 
 } // namespace WTF