GitLab

Previously, we'd leave presentation but the timeouts would still be
active. This could result in the timeout UI showing, even when using the
2D browsing UI.

Bug: 794297
Change-Id: I89ba432f00cd27ae585f15a560d5212efca8798b
Reviewed-on: https://chromium-review.googlesource.com/823155
Commit-Queue: Ian Vollick <vollick@chromium.org>
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523615}