This reverts commit 51ad234f.

Reason for revert: Speculative revert. Suspect for layout test change:
https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8-Blink%20Linux%2064/25165

See also:
https://github.com/v8/v8/wiki/Blink-layout-tests

The bots currently have another problem with webkit_unit_tests and
don't run the layout tests on every revision. Hence the speculative
revert.

Original change's description:
> [Intl] move localeCompare to C++
> 
> 
> Bug: v8:7958
> Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
> Change-Id: I84a27dda5205c8581a7ffe37213d685cc49974fa
> Reviewed-on: https://chromium-review.googlesource.com/1144644
> Commit-Queue: Frank Tang <ftang@chromium.org>
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54740}

TBR=jshin@chromium.org,gsathya@chromium.org,bstell.chromium.org@gmail.com,ftang@chromium.org

Change-Id: Iceab3316bd1eacfe449c8182cbb3027acb56047e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7958
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/1152767Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54747}