nsIStyleContext *context = nsnull; GetUndisplayedContent(aContent, &context);
nsStyleContext *context = GetUndisplayedContent(aContent);
FrameManager::ClearUndisplayedContentIn(nsIContent* aContent, nsIContent* aParentContent){  NS_ENSURE_TRUE(mPresShell, NS_ERROR_NOT_AVAILABLE);#ifdef DEBUG_UNDISPLAYED_MAP  static int i = 0;  printf("ClearUndisplayedContent(%d): content=%p parent=%p --> ", i++, (void *)aContent, (void*)aParentContent);#endif    if (mUndisplayedMap) {    UndisplayedNode* node = mUndisplayedMap->GetFirstNode(aParentContent);    while (node) {      if (node->mContent == aContent) {        nsresult rv = mUndisplayedMap->RemoveNodeFor(aParentContent, node);#ifdef DEBUG_UNDISPLAYED_MAP        printf( "REMOVED! (rv=%d)\n", (int)rv);#endif#ifdef DEBUG        // make sure that there are no more entries for the same content        nsIStyleContext *context = nsnull;        GetUndisplayedContent(aContent, &context);        NS_ASSERTION(context == nsnull, "Found more undisplayed content data after removal");#endif        return rv;      }      node = node->mNext;    }  }  return NS_OK;}