Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I20fd23b5370d15dddc913f6bdb05e649d71c2059
Reviewed-on: https://chromium-review.googlesource.com/1224373Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#55919}