Import wpt@68512623f6b74070955634b7c256b9debc743250

Using wpt-import in Chromium b680e487.
With Chromium commits locally applied on WPT:
9a749c24 "[scroll-animations] Handle implicit 'auto' offsets correctly"


Note to sheriffs: This CL imports external tests and adds
expectations for those tests; if this CL is large and causes
a few new failures, please fix the failures by adding new
lines to TestExpectations rather than reverting. See:
https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md

Directory owners for changes in this CL:
foolip@chromium.org, lpz@chromium.org, robertma@chromium.org:
  external/wpt/tools

NOAUTOREVERT=true
TBR=robertma@google.com

No-Export: true
Cq-Include-Trybots: luci.chromium.try:linux-wpt-identity-fyi-rel,linux-wpt-payments-fyi-rel
Change-Id: I7ec9f31d4fc2153623d578c83184e3354404bd18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2522232


Reviewed-by: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#824835}