ExitReflowLock(PR_TRUE);
DidCauseReflow();
PresShell::ContentStatesChanged(nsIDocument* aDocument,                                nsIContent* aContent1,                                nsIContent* aContent2){  EnterReflowLock();  nsresult rv = mStyleSet->ContentStatesChanged(mPresContext, aContent1, aContent2);  VERIFY_STYLE_TREE;  ExitReflowLock(PR_TRUE);  return rv;}