Handle odd data lengths in UTF-16 decoder

Source/wtf/text/TextCodecUTF8.cpp

 /*
  * Copyright (C) 2004, 2006, 2008, 2011 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 247 matching lines @@
             continue;
         }
 
         m_partialSequenceSize -= count;
         destination = appendCharacter(destination, character);
     } while (m_partialSequenceSize);
 
     return false;
 }
 
-String TextCodecUTF8::decode(const char* bytes, size_t length, bool flush, bool stopOnError, bool& sawError)
+String TextCodecUTF8::decode(const char* bytes, size_t length, FlushBehavior flush, bool stopOnError, bool& sawError)
 {
     // Each input byte might turn into a character.
     // That includes all bytes in the partial-sequence buffer because
     // each byte in an invalid sequence will turn into a replacement character.
     StringBuffer<LChar> buffer(m_partialSequenceSize + length);
 
     const uint8_t* source = reinterpret_cast<const uint8_t*>(bytes);
     const uint8_t* end = source + length;
     const uint8_t* alignedEnd = alignToMachineWord(end);
     LChar* destination = buffer.characters();
@@ skipping 175 matching lines @@
 {
     return encodeCommon(characters, length);
 }
 
 CString TextCodecUTF8::encode(const LChar* characters, size_t length, UnencodableHandling)
 {
     return encodeCommon(characters, length);
 }
 
 } // namespace WTF