return mRuleNode->GetStyleData(aSID, this);
return mRuleNode->GetStyleData(aSID, this, PR_TRUE);
const nsStyleStruct* nsStyleContext::GetStyleData(nsStyleStructID aSID){  const nsStyleStruct* cachedData = mCachedStyleData.GetStyleData(aSID);   if (cachedData)    return cachedData; // We have computed data stored on this node in the context tree.  return mRuleNode->GetStyleData(aSID, this); // Our rule node will take care of it for us.}