GitLab

The screensaver in demo mode should be full-screen and keep staying on
top, otherwise user experience would be really bad. If these two things
can't be achieved together, I think we should give up using Chrome App
for screensaver.

The demo mode screensaver app implements its own mechanism to close the
window when there's user interaction. If some security issues arise,
it'll be the demo mode team's responsibility to fix it.

TBR=rdevlin.cronin@chromium.org

Bug: 870851
Change-Id: I9773ec9dc99dd6b01c5202bcb5678cd0a59a544b
Reviewed-on: https://chromium-review.googlesource.com/1214602
Commit-Queue: Wenzhao (Colin) Zang <wzang@chromium.org>
Reviewed-by: Sergey Volk <servolk@chromium.org>
Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592493}