Measure finalization time for streaming JS compilation (to measure impact
of off-thread streaming finalization).

Bug: chromium:865098
Bug: chromium:1011762
Change-Id: Idc89ea18e55fec87ac7e8cca28925820e0c56b84
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1844783
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64190}