Convert moar Sheriff-o-Matic tests to Polymer.

BUG=400387
R=ojan@chromium.org,esprehn@chromium.org,leviw@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/459463003

git-svn-id: svn://svn.chromium.org/blink/trunk@180026 bbb929c8-8fbe-4397-9dbb-9b2b20218538