CaptureChange(nsIStyleContext* aOldContext, nsIStyleContext* aNewContext,
CaptureChange(nsStyleContext* aOldContext, nsStyleContext* aNewContext,
CaptureChange(nsIStyleContext* aOldContext, nsIStyleContext* aNewContext,              nsIFrame* aFrame, nsIContent* aContent,              nsStyleChangeList& aChangeList, nsChangeHint aMinChange){  nsChangeHint ourChange = NS_STYLE_HINT_NONE;  aOldContext->CalcStyleDifference(aNewContext, ourChange);  if (NS_UpdateHint(aMinChange, ourChange)) {    aChangeList.AppendChange(aFrame, aContent, ourChange);  }  return aMinChange;}