When Defense Counsel errs by not objecting to an improper courtroom closure, should reviewing courts apply a "fundamental unfairness" test, or the traditional test (reasonable probability of a different outcome) when analyzing prejudice under the second prong of Strickland v. Washington, 466 U.S. 668 (1984)?

When Defense Counsel errs by not objecting to an improper courtroom closure, should reviewing courts apply a 'fundamental unfairness' test, or the traditional test (reasonable probability of a different outcome) when analyzing prejudice under the second prong of Strickland v. Washington, 466 U.S. 668 (1984)?