GitLab

Allows the metric to appear on the dashboard.
We're indexing by form factor because virtual keyboard usage depends
heavily on the form factor.

Bug: 752657
Change-Id: I7d32135c45fee05d86c3ce96b43831cc1ba648e3
Reviewed-on: https://chromium-review.googlesource.com/c/1353043Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612388}