opt in web share to ukm use counter

Change-Id: I9806545fd84b6e17d1d3c4c81155d099396d89cd
Reviewed-on: https://chromium-review.googlesource.com/c/1352587
Reviewed-by: Bryan McQuade <bmcquade@chromium.org>
Reviewed-by: Matt Giuca <mgiuca@chromium.org>
Commit-Queue: Luna Lu <loonybear@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612743}
1 file changed