GitLab

First cut based on spec at http://go/e14s-emoji-addition-mock

Bug: 1093178
Change-Id: I274d95df44ccc04d03fddec60b90b6a679ee3000
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2239908Reviewed-by: Keith Lee <keithlee@chromium.org>
Reviewed-by: Darren Shen <shend@chromium.org>
Commit-Queue: My Nguyen <myy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#777274}