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

Source/wtf/RefCountedLeakCounter.h

 /*
  *  Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 20 matching lines @@
         WTF_EXPORT_PRIVATE static void cancelMessageSuppression(const char*);
         
         WTF_EXPORT_PRIVATE explicit RefCountedLeakCounter(const char* description);
         WTF_EXPORT_PRIVATE ~RefCountedLeakCounter();
 
         WTF_EXPORT_PRIVATE void increment();
         WTF_EXPORT_PRIVATE void decrement();
 
 #ifndef NDEBUG
     private:
-#if COMPILER(MINGW) || COMPILER(MSVC7_OR_LOWER) || OS(WINCE)
+#if COMPILER(MINGW) || COMPILER(MSVC7_OR_LOWER)
         int m_count;
 #else
         volatile int m_count;
 #endif
         const char* m_description;
 #endif
     };
 
 }  // namespace WTF
 
 #endif