KeyAppendString(nsDependentString(atomString), aKey);
KeyAppendString(nsDependentCString(atomString), aKey);
static inline void KeyAppendAtom(nsIAtom* aAtom, nsACString& aKey){  NS_PRECONDITION(aAtom, "KeyAppendAtom: aAtom can not be null!\n");  const PRUnichar* atomString = nsnull;  aAtom->GetUnicode(&atomString);  KeyAppendString(nsDependentString(atomString), aKey);}