static PRInt32 GetStyleImpactFrom(const nsHTMLValue& aValue)
static nsChangeHint GetStyleImpactFrom(const nsHTMLValue& aValue)
static PRInt32 GetStyleImpactFrom(const nsHTMLValue& aValue){  PRInt32 hint = NS_STYLE_HINT_NONE;  if (eHTMLUnit_ISupports == aValue.GetUnit()) {    nsCOMPtr<nsISupports> supports(dont_AddRef(aValue.GetISupportsValue()));    nsCOMPtr<nsICSSStyleRule> cssRule(do_QueryInterface(supports));    if (cssRule) {      nsCSSDeclaration* declaration = cssRule->GetDeclaration();      if (declaration) {        hint = declaration->GetStyleImpact();      }    }  }  return hint;}