Proposal repository:
https://github.com/tc39/proposal-global

Intent to ship:
https://groups.google.com/d/msg/v8-users/Vkoh0wXRwaM/Yt7MpzhkAgAJ

Bug: v8:5537
Change-Id: I60a6c5375165d89548db12fef454a64137d04c27
Reviewed-on: https://chromium-review.googlesource.com/1195494Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55543}