Remove virtual func default arg and typedef in AsyncProcessor.h
Remove virtual func default arg and typedef in AsyncProcessor.h

Reviewed By: yfeldblum

Differential Revision: D22193421

fbshipit-source-id: 0ae43401c4ab670dccc3e5802cafd7f172788f06

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift