Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I5686fa0c1ed73b17f592a012b00c08c575ae5387
Reviewed-on: https://chromium-review.googlesource.com/1234234Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56062}