Import wpt@7b262dcffc73f38f7d62fa2093063c9a96bc307e

Using wpt-import in Chromium 873ae3cb.
With Chromium commits locally applied on WPT:
7eed88d6 "Update popup-redirect-cache.https.html to use dispatcher"
f42f06a8 "Don't serialize grid shorthand if it can't be roundtripped"
c0ab0367 "Ensure that all popups get closed for popup-redirect-cache.https.html"


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/+/main/docs/testing/web_platform_tests.md

NOAUTOREVERT=true
R=rubber-stamper@appspot.gserviceaccount.com

No-Export: true
Cq-Include-Trybots: luci.chromium.try:linux-wpt-identity-fyi-rel,linux-wpt-input-fyi-rel,linux-blink-rel
Change-Id: Ic55345ad5e146cc3d7aa935c9145036b6b7b4664
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3857567
Auto-Submit: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1039412}