Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I829fe79b95a0275ccc94e32fea2cdc74affef714
Reviewed-on: https://chromium-review.googlesource.com/1228066Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56050}