Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: I7ae9463768969d2821b19fa0d8c8a498d51f6b40
Reviewed-on: https://chromium-review.googlesource.com/1209943Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#55743}