Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I5645a85ca7d85ca9abf2cde9ed4191b1ae06ca73
Reviewed-on: https://chromium-review.googlesource.com/1224170Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56046}