GitLab

This is an existing example of how a built-in ash feature can be done
with a mojo app, so put it in //ash/components.

Bug: 815334
Test: ash_unittests, autoclick still works in mash
Change-Id: I1d38901a96708cbd2d3fc17c39f66e537851a61b
Reviewed-on: https://chromium-review.googlesource.com/935755Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#539337}