See implementation: [NetworkContext::PreconnectSockets](https://source.chromium.org/chromium/chromium/src/+/main:services/network/network_context.cc;bpv=1;bpt=1;l=2269?q=resolvehost%20network_context.cc&ss=chromium%2Fchromium%2Fsrc&gsn=PreconnectSockets&gs=KYTHE%3A%2F%2Fkythe%3A%2F%2Fchromium.googlesource.com%2Fcodesearch%2Fchromium%2Fsrc%2F%2Fmain%3Flang%3Dc%252B%252B%3Fpath%3Dservices%2Fnetwork%2Fnetwork_context.cc%23-6AgpD0YZwv5iIUBj7aUtB83F1Izqhl7NbNshYwjmo8) link preconnect is blocked if the request's nonce is marked as network revoked.