[vr] Repositioner and Resizer should update world space transform

These previously thought they were clean when they weren't causing
stale positions to be applied after repositioning.

Bug: 831410,831402
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_vr;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: Ib7b5e1a8023f2231ff68452a43bbb372426b9f2f
Reviewed-on: https://chromium-review.googlesource.com/1006355
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Commit-Queue: Ian Vollick <vollick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549877}
4 files changed