Import wpt@36ff3198676718b4af5d55c5e6c1ec8c51a2a0d6

Using wpt-import in Chromium 52d33a46.
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

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: Ifa4ef2138c9d62a2c360f46a8fc2a98ce94fa3cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2522231


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@{#824791}