... and use it in JSCallReducer.

Bug: v8:7790
Change-Id: If8ed329fef4a4de8938a2d7009cb94c0e85242f0
Reviewed-on: https://chromium-review.googlesource.com/c/1314568Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57214}