nsresult GetStyleContext(nsIStyleContext** aStyleContext) const { *aStyleContext = mStyleContext; NS_IF_ADDREF(*aStyleContext); return NS_OK; }
nsStyleContext* GetStyleContext() const { return mStyleContext; }
  nsresult GetStyleContext(nsIStyleContext** aStyleContext) const {     *aStyleContext = mStyleContext; NS_IF_ADDREF(*aStyleContext); return NS_OK;  }