rv = manager->ReParentStyleContext(*this, aFrame, aNewParentContext);
rv = manager->ReParentStyleContext(this, aFrame, aNewParentContext);
nsPresContext::ReParentStyleContext(nsIFrame* aFrame,                                     nsIStyleContext* aNewParentContext){  NS_PRECONDITION(aFrame, "null ptr");  if (! aFrame) {    return NS_ERROR_NULL_POINTER;  }  nsCOMPtr<nsIFrameManager> manager;  nsresult rv = mShell->GetFrameManager(getter_AddRefs(manager));  if (NS_SUCCEEDED(rv) && manager) {    rv = manager->ReParentStyleContext(*this, aFrame, aNewParentContext);  }  return rv;}