GitLab

Adding a DCHECK() and a null check.

Bug: 883329
Change-Id: I56efb844c7cc6788ac04e9f494608ef18e94cd78
Reviewed-on: https://chromium-review.googlesource.com/1236454Reviewed-by: Hongchan Choi <hongchan@chromium.org>
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592817}