Import wpt@e78c95ebf1cce550e9b7e55b281d4c10e9b99d48

Using wpt-import in Chromium c738d46c.
With Chromium commits locally applied on WPT:
0f8fd66b "[WPT/common/security-features] Support sub projects and split referrer-policy 4K tests"
b4420ced "Revert "Update timeout and split slow COOP WPTs""


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

No-Export: true
Change-Id: I88d141245a54c2c47c242ad26b85943f2665e2a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2010924Reviewed-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@{#733416}

third_party/blink/web_tests/external/wpt/html/cross-origin-opener-policy/popup-meta-http-equiv.https.html.headers

-Cross-Origin-Opener-Policy: same-origin