scrollable->ScrollTo(aX,aY, NS_SCROLL_PROPERTY_ALWAYS_BLIT);
scrollable->ScrollTo(aX, aY, aFlags);
nsGfxScrollFrameInner::ScrollbarChanged(nscoord aX, nscoord aY){  nsIScrollableView* scrollable = GetScrollableView();  scrollable->ScrollTo(aX,aY, NS_SCROLL_PROPERTY_ALWAYS_BLIT); // printf("scrolling to: %d, %d\n", aX, aY);}