Remove an unneccessary FIXME comment for HTMLToken

Source/core/html/parser/HTMLToken.h

 /*
  * Copyright (C) 2013 Google, 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 25 matching lines @@
 class DoctypeData {
     WTF_MAKE_NONCOPYABLE(DoctypeData);
 public:
     DoctypeData()
         : m_hasPublicIdentifier(false)
         , m_hasSystemIdentifier(false)
         , m_forceQuirks(false)
     {
     }
 
-    // FIXME: This should use String instead of Vector<UChar>.
     bool m_hasPublicIdentifier;
     bool m_hasSystemIdentifier;
     WTF::Vector<UChar> m_publicIdentifier;
     WTF::Vector<UChar> m_systemIdentifier;
     bool m_forceQuirks;
 };
 
 static inline Attribute* findAttributeInVector(Vector<Attribute>& attributes, const QualifiedName& name)
 {
     for (unsigned i = 0; i < attributes.size(); ++i) {
@@ skipping 393 matching lines @@
     // A pointer into m_attributes used during lexing.
     Attribute* m_currentAttribute;
 
     // For DOCTYPE
     OwnPtr<DoctypeData> m_doctypeData;
 };
 
 }
 
 #endif