GitLab

/deep/ selector no longer works in Polymer 2. Update iron-list to find
the focused element differently.

Bug: 899113
Change-Id: I5c548adbe680a5980638e4905bffdf7fceb977e6
Reviewed-on: https://chromium-review.googlesource.com/c/1316443Reviewed-by: Scott Chen <scottchen@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606715}