- No noticeable changes in runtime performance according to js-perf-test/RegExp/{base_search.js, base_match.js} benchmarks
- Slight builtin code sizes reduction:

BEFORE
======
TFJ Builtin, StringPrototypeSearch, 1592
TFJ Builtin, StringPrototypeMatch, 1592

AFTER
=====
TFJ Builtin, StringPrototypeSearch, 1432
TFJ Builtin, StringPrototypeMatch, 1432

Bug: v8:8996
Change-Id: Ifeadac1c924a36003a41be3b805438522f8188be
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2670247Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Cr-Commit-Position: refs/heads/master@{#72592}