Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I8546c58afbac278a764067173570b433dff6674d
Reviewed-on: https://chromium-review.googlesource.com/1224413Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#55896}