Warner Bros. is shaking up its film studio. As part of a major reorganization, Toby Emmerich is being promoted to chairman of Warner Bros. Pictures Group, while Sue Kroll, the president of worldwide marketing and distribution, is relinquishing her role for a three-year producer deal on the Burbank lot. Kroll has been with the studio for decades and has deep relationships with filmmakers and stars such as Christopher Nolan, Clint Eastwood, and Tom Cruise. She will become a producer on the lot.