To help with reviewing and porting intl.js

Bug: v8:5751
Change-Id: Ic8ad425e7ff14ed39ff28e907f9d1e83a3629398
Reviewed-on: https://chromium-review.googlesource.com/1132821
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54372}