GitLab

Summary of changes available at:
https://chromium.googlesource.com/chromium/blink/+log/5ae2306..4e2f10b

TBR=schenney@chromium.org,dominicc@chromium.org

Review URL: https://codereview.chromium.org/779423003

Cr-Commit-Position: refs/heads/master@{#307147}