GitLab

This is a follow-up patch of https://codereview.chromium.org/2332843002/

Import wpt@de70de04726dedd0981c644669911096854929b6

Using update-w3c-deps in Chromium
8e715596.

Review-Url: https://codereview.chromium.org/2342603002
Cr-Commit-Position: refs/heads/master@{#418649}