GitLab

MVP.
Use the old CandidateWindow for UI.
Screenshot view here http://screen/RMd0QQFyoNo
Emoji-map lives in Google3, view here
http://google3/i18n/input/javascript/chos/ui/resource/emoji/emoji-map.csv
Interactions:
-Tab,Right,Enter commit the chosen emoji
-Up,Down moves to choose candidates

Bug: 1065308
Change-Id: If1b3a662a3a6e7e410099c1abca8cfce3d2a1a32
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2123494
Commit-Queue: My Nguyen <myy@chromium.org>
Reviewed-by: Darren Shen <shend@chromium.org>
Reviewed-by: Keith Lee <keithlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755984}