Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I0ba7bd3bf3665d4fb43f89b4cc9ab403d974930f
Reviewed-on: https://chromium-review.googlesource.com/1228067Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56060}