chromium/third_party/blink/web_tests/wpt_internal/html/cross-origin-opener-policy/reporting/navigation-reporting/report-only-same-origin-report-to.https.html.sub.headers

Cross-Origin-Opener-Policy-Report-Only: same-origin; report-to="coop-report-only-endpoint"
Referrer-Policy: origin
report-to: { "group": "coop-report-endpoint", "max_age": 10886400, "endpoints": [{ "url": "/reporting/resources/report.py?reportID=380ca360-d1ae-4329-b1dd-69cea49cd705" }] }, { "group": "coop-report-only-endpoint", "max_age": 10886400, "endpoints": [{ "url": "/reporting/resources/report.py?reportID=cf9ac91d-6c5d-4489-a420-10be9402ef84" }]}