GitLab

Previously, when a modal was open, the left and right arrow keys were
activating the accelerator used to toggle between users on the the
main login screen underneath.

Fixed: 1019912
Change-Id: Ibd9cde9e7239566ae75c36a388722b4a08b0a71c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1930105Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Commit-Queue: Jon Mann <jonmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718408}