Handle odd data lengths in UTF-16 decoder

Source/wtf/text/TextCodecUTF16.h

Index: Source/wtf/text/TextCodecUTF16.h
diff --git a/Source/wtf/text/TextCodecUTF16.h b/Source/wtf/text/TextCodecUTF16.h
index 49b278f7e746aea3ffd2873723dd19228a76f9d3..41174b78ab474690d12fd4b6aab66cb7d5b86e6f 100644
--- a/Source/wtf/text/TextCodecUTF16.h
+++ b/Source/wtf/text/TextCodecUTF16.h
@@ -37,7 +37,7 @@ namespace WTF {
 
         TextCodecUTF16(bool littleEndian) : m_littleEndian(littleEndian), m_haveBufferedByte(false) { }
 
-        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;