An oversight in my previous change (3b64764b) could
cause a CHECK failure.

Bug: chromium:904707
Change-Id: Ie5f1c500bddc00741b889f78ae9ecd9af581ba5c
Reviewed-on: https://chromium-review.googlesource.com/c/1333409Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57459}