GitLab

Should result in nullptr crashes which may be easier to debug to
find culprits which are violating this.

R=tguilbert

Bug: 1035556
Change-Id: I14fe4ad3680e536b1193b47d0127ba46cda6b93e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2451383
Commit-Queue: Thomas Guilbert <tguilbert@chromium.org>
Auto-Submit: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813993}