content->SetAttribute(kNameSpaceID_None, nsXULAtoms::collapsed, NS_ConvertToString("true"), PR_TRUE);
content->SetAttribute(kNameSpaceID_None, nsXULAtoms::collapsed, NS_LITERAL_STRING("true"), PR_TRUE);
nsGfxScrollFrameInner::SetScrollbarVisibility(nsIBox* aScrollbar, PRBool aVisible){  nsIFrame* frame = nsnull;  aScrollbar->GetFrame(&frame);  nsCOMPtr<nsIContent> content;  frame->GetContent(getter_AddRefs(content));    PRBool old = PR_TRUE;  nsAutoString value;  if (NS_CONTENT_ATTR_HAS_VALUE == content->GetAttribute(kNameSpaceID_None, nsXULAtoms::collapsed, value))    old = PR_FALSE;    if (aVisible == old)    return;  if (!aVisible)     content->SetAttribute(kNameSpaceID_None, nsXULAtoms::collapsed, NS_ConvertToString("true"), PR_TRUE);  else     content->UnsetAttribute(kNameSpaceID_None, nsXULAtoms::collapsed, PR_TRUE);  nsCOMPtr<nsIScrollbarFrame> scrollbar(do_QueryInterface(aScrollbar));  if (scrollbar) {    // See if we have a mediator.    nsCOMPtr<nsIScrollbarMediator> mediator;    scrollbar->GetScrollbarMediator(getter_AddRefs(mediator));    if (mediator) {      // Inform the mediator of the visibility change.      mediator->VisibilityChanged(aVisible);    }  }}