Broken: 2.79 5bd8ac9
Working: 2.78c (all)
Short description of error
When using two fingers to orbit the camera, using this gesture: https://i.imgur.com/Fq6lpuT.gif , the direction is inverted in 2.79.
This is NOT a natural scroll issue; modifying either blender or the system natural scroll setting does not affect this issue.
Exact steps for others to reproduce the error
Using any file (even startup) will produce the issue. Compare to 2.78c for the correct implementation.