PostScrollEvent();
nsGfxScrollFrameInner::ScrollPositionDidChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY){  NS_ASSERTION(!mViewInitiatedScroll, "Cannot reenter ScrollPositionDidChange");  mViewInitiatedScroll = PR_TRUE;  InternalScrollPositionDidChange(aX, aY);  mViewInitiatedScroll = PR_FALSE;    PostScrollEvent();    return NS_OK;}