ToNewUnicode( const nsAReadableString& aSource )
ToNewUnicode( const nsAString& aSource )
ToNewUnicode( const nsAReadableString& aSource )  {    // no conversion needed, just allocate a buffer of the correct length and copy into it    PRUnichar* result = AllocateStringCopy(aSource, (PRUnichar*)0);    nsReadingIterator<PRUnichar> fromBegin, fromEnd;    PRUnichar* toBegin = result;    *copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), toBegin) = PRUnichar(0);    return result;  }