This is a step towards implementing conditions.

Bug: 570091
Change-Id: I99467033082d96021854c23dcff3fc2b56f995b4
Reviewed-on: https://chromium-review.googlesource.com/517107Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Paweł Hajdan Jr. <phajdan.jr@chromium.org>