GitLab

Summary of changes available at:
https://chromium.googlesource.com/chromium/blink/+log/12a5230..7f3bd0d

TBR=timloh@chromium.org,leviw@chromium.org

Review URL: https://codereview.chromium.org/882883002

Cr-Commit-Position: refs/heads/master@{#313435}