This is a reland of 7b744e3a

I cannot reproduce the problem in this reland CL. I think
the origin breakage is just due to test flakiness.
Try to reland it without changes

TBR=jshin@chromium.org

Original change's description:
> [Intl] Replace uloc_(to|for)Language w/ Locale API
>
> Bug: v8:8468
> Change-Id: Id2f8d165e5f29f429821b44def2512fe760c0a51
> Reviewed-on: https://chromium-review.googlesource.com/c/1377989
> Reviewed-by: Jungshik Shin <jshin@chromium.org>
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Commit-Queue: Frank Tang <ftang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#58260}

Bug: v8:8468
Change-Id: I5f34d061d630d07f5c9da07f9adb1efa040d66d5
Reviewed-on: https://chromium-review.googlesource.com/c/1378658Reviewed-by: Frank Tang <ftang@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58297}