Always layout the fore view controller's view if needed during a transition.
Always layout the fore view controller's view if needed during a transition.

Reviewers: O2 Material Motion, O4 Material Apple platform reviewers, #material_motion, markwei

Reviewed By: O2 Material Motion, O4 Material Apple platform reviewers, #material_motion, markwei

Tags: #material_motion

Differential Revision: http://codereview.cc/D2611

material-motion/material-motion-swift,material-motion/material-motion-swift