Remove an unneccessary FIXME comment for HTMLToken

Source/core/html/parser/AtomicHTMLToken.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 78 matching lines @@
         return m_data;
     }
 
     const String& comment() const
     {
         ASSERT(m_type == HTMLToken::Comment);
         return m_data;
     }
 
     // FIXME: Distinguish between a missing public identifer and an empty one.
-    Vector<UChar>& publicIdentifier() const
+    String& publicIdentifier() const
     {
         ASSERT(m_type == HTMLToken::DOCTYPE);
         return m_doctypeData->m_publicIdentifier;
     }
 
     // FIXME: Distinguish between a missing system identifer and an empty one.
-    Vector<UChar>& systemIdentifier() const
+    String& systemIdentifier() const
     {
         ASSERT(m_type == HTMLToken::DOCTYPE);
         return m_doctypeData->m_systemIdentifier;
     }
 
     explicit AtomicHTMLToken(HTMLToken& token)
         : m_type(token.type())
     {
         switch (m_type) {
         case HTMLToken::Uninitialized:
@@ skipping 29 matching lines @@
         : m_type(token.type())
     {
         switch (m_type) {
         case HTMLToken::Uninitialized:
             ASSERT_NOT_REACHED();
             break;
         case HTMLToken::DOCTYPE:
             m_name = AtomicString(token.data());
             m_doctypeData = adoptPtr(new DoctypeData());
             m_doctypeData->m_hasPublicIdentifier = true;
-            append(m_doctypeData->m_publicIdentifier, token.publicIdentifier());
+            m_doctypeData->m_publicIdentifier = token.publicIdentifier();
             m_doctypeData->m_hasSystemIdentifier = true;
-            append(m_doctypeData->m_systemIdentifier, token.systemIdentifier());
+            m_doctypeData->m_systemIdentifier = token.systemIdentifier();
             m_doctypeData->m_forceQuirks = token.doctypeForcesQuirks();
             break;
         case HTMLToken::EndOfFile:
             break;
         case HTMLToken::StartTag:
             m_attributes.reserveInitialCapacity(token.attributes().size());
             for (Vector<CompactHTMLToken::Attribute>::const_iterator it = token.attributes().begin(); it != token.attributes().end(); ++it) {
                 QualifiedName name(nullAtom, AtomicString(it->name), nullAtom);
                 // FIXME: This is N^2 for the number of attributes.
                 if (!findAttributeInVector(m_attributes, name))
@@ skipping 75 matching lines @@
         const QualifiedName& name = nameForAttribute(attribute);
         // FIXME: This is N^2 for the number of attributes.
         if (!findAttributeInVector(m_attributes, name))
             m_attributes.append(Attribute(name, value));
     }
 }
 
 }
 
 #endif