GitLab

This will make sure everything underneath is completely occluded, so
nothing gets drawn.

Test: manual
Bug: 961549
Change-Id: I5124f8ffcee607964b8460f7214d962092a2e697
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1642370Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#668467}