The master of his domain will survey the field from his press box lair. It will be a familiar sight to USC football fans. And more than one will be greeted by a wistful, wishful feeling. Oh, what might have been if Norm Chow was not the enemy. When USC takes the field at the Rose Bowl to face UCLA on Saturday, it will be the first time since practice on Jan. 2, 2005 that an offense led by Chow squared off against a defense led by Pete Carroll.