Gap Inc. has tapped a top Mattel executive who re-energized Barbie and Hot Wheels to be its next president and CEO. The San Francisco-based chain, which operates stores under its namesake as well as Old Navy, Banana Republic and Athleta, said Wednesday that Richard Dickson will join Gap on Aug. 22 from his most recent role as president and chief operating officer of toy giant Mattel. The CEO spot had been vacant since Sonia Syngal left last July. Dickson has been a board member of Gap since November.