Import wpt@d1b4f7aab82f764eb545f1fccf94c43b8591e743

https://github.com/web-platform-tests/wpt/compare/b72282f5f...d1b4f7aab

Using wpt-import in Chromium 7cfb44c4.
With Chromium commits locally applied on WPT:
  5fdbc88b "Convert all layer WPT tests to synchronous [...]
  256090d9 "Reland "Cross-origin support for [...]
  869e38fe "Add support for generating multiple canvas test [...]

Note to gardeners: 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:
japhet@chromium.org:
  external/wpt/fetch
jsbell@chromium.org:
  external/wpt/IndexedDB
  external/wpt/encoding
  external/wpt/resources
jsbell@chromium.org, mek@chromium.org:
  external/wpt/FileAPI
kojii@chromium.org:
  external/wpt/css/css-scoping

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: I549bce317e5addf8b21fe393fddf2b7fe0bc7255
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5434453
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@{#1283891}