Import wpt@a092215fbf94a99eee2137327b452db80f52a7ad

Using wpt-import in Chromium 6f409710.
With Chromium commits locally applied on WPT:
a3e84dde "webnn: Remove sync methods"
075c2ea3 "Content-shell support for the SetRPHRegistrationMode webdriver command"
aac36378 "Revert "webnn: Remove sync methods""
12977d15 "Reland "webnn: Remove sync methods""



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

Directory owners for changes in this CL:
cbiesinger@chromium.org:
  external/wpt/css/css-flexbox

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

No-Export: true
Validate-Test-Flakiness: skip
Cq-Include-Trybots: luci.chromium.try:linux-blink-rel
Change-Id: I132d2c381c402615360e91ff39b243b4d5eaf288
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5300520
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1262084}