GitLab

This brings paper-item v0.8.2 into third_party/polymer/v0_8.

I got a presubmit warning about not updating README.chromium.
Will that actually be a problem in the CQ?

BUG=485381

Review URL: https://codereview.chromium.org/1124133004

Cr-Commit-Position: refs/heads/master@{#329464}