nsSize constrainedSize; aState.GetScrolledBlockSizeConstraint(constrainedSize);
nsSize constrainedSize = aState.ScrolledBlockSizeConstraint();
UseHTMLReflowConstraints(nsBoxToBlockAdaptor* aAdaptor, nsBoxLayoutState& aState) {  nsSize constrainedSize;  aState.GetScrolledBlockSizeConstraint(constrainedSize);  if (constrainedSize.width < 0 || constrainedSize.height < 0) {    return PR_FALSE;  }  nsIFrame* frame;  aAdaptor->GetFrame(&frame);  if (!frame) {    return PR_FALSE;  }  nsIFrame* parentFrame = frame->GetParent();  if (!parentFrame) {    return PR_FALSE;  }  if (parentFrame->GetType() != nsLayoutAtoms::scrollFrame) {    return PR_FALSE;  }  return PR_TRUE;}