Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I5164899da0994a855182ed203572c5984ab87449
Reviewed-on: https://chromium-review.googlesource.com/1227070Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#55938}