nsStyleColor* styleColor = (nsStyleColor*)(aContext->GetMutableStyleData(eStyleStruct_Color));
nsIStyleContext* parentContext = aContext->GetParent();
HTMLColorRule::MapStyleInto(nsIMutableStyleContext* aContext, nsIPresContext* aPresContext){  nsStyleColor* styleColor = (nsStyleColor*)(aContext->GetMutableStyleData(eStyleStruct_Color));  if (nsnull != styleColor) {    styleColor->mColor = mColor;  }  return NS_OK;}