Handle odd data lengths in UTF-16 decoder

Source/wtf/text/TextCodecUserDefined.h

 /*
  * Copyright (C) 2007 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 18 matching lines @@
 #include "wtf/text/TextCodec.h"
 
 namespace WTF {
 
     class TextCodecUserDefined FINAL : public TextCodec {
     public:
         static void registerEncodingNames(EncodingNameRegistrar);
         static void registerCodecs(TextCodecRegistrar);
 
     private:
-        virtual String decode(const char*, size_t length, bool flush, bool stopOnError, bool& sawError) OVERRIDE;
+        virtual String decode(const char*, size_t length, FlushBehavior, bool stopOnError, bool& sawError) OVERRIDE;
         virtual CString encode(const UChar*, size_t length, UnencodableHandling) OVERRIDE;
         virtual CString encode(const LChar*, size_t length, UnencodableHandling) OVERRIDE;
 
         template<typename CharType>
         CString encodeCommon(const CharType*, size_t length, UnencodableHandling);
     };
 
 } // namespace WTF
 
 #endif // TextCodecUserDefined_h