Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: Ifb940f40d4145a6074702a3d870242aeca625d96
Reviewed-on: https://chromium-review.googlesource.com/1224092Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#55913}