Bug 965871 - Minor cleanup and refactoring. r=kats
Bug 965871 - Document lock ordering in APZ. r=kats
Bug 965871 - Introduce a mechanism for AsyncPanZoomAnimation::Sample() to schedule tasks to be performed after the APZC lock is released in SampleContentTransformForFrame(). r=kats
Bug 965871 - Implement overscroll handoff for flings. r=kats
Bug 981359 - |mach valgrind-test|: Increase --num-callers from 20 to 36. r=gkw.