... and use it in JSCallReducer.

Bug: v8:7790
Change-Id: I1ff3d8d4d4a2936e6184ae5e842674117a96c7e2
Reviewed-on: https://chromium-review.googlesource.com/c/1314335Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57210}