Fixing clang-tidy warning.

Bug: v8:8015
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I722e15193b3b269e94dc8e5aba80f6f73c95cda8
Reviewed-on: https://chromium-review.googlesource.com/1228036
Commit-Queue: Florian Sattler <sattlerf@google.com>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56109}