AddRemoveScrollbar(mHasHorizontalScrollbar, aScrollAreaSize.height, aSbSize.height, PR_FALSE);
nsGfxScrollFrameInner::RemoveHorizontalScrollbar(const nsSize& aSbSize, nsSize& aScrollAreaSize){   AddRemoveScrollbar(mHasHorizontalScrollbar, aScrollAreaSize.height, aSbSize.height, PR_FALSE);}