Jim Harbaugh: Tim Brown should be ashamed of what he said

San Francisco coach Jim Harbaugh was on Bill Callahan’s staff in Oakland when the Raiders played in a Super Bowl that receiver Tim Brown recently accused Callahan of throwing. Suffice to say, Harbaugh thinks Brown’s accusation is hogwash. Harbaugh told Bob Glauber of Newsday that Brown “was not factual at all and I really think…