Pass the right arguments to make FedCM tests work

[cbiesinger]

This effectively ports these Chromium patches to wptrunner: https://chromium-review.googlesource.com/c/chromium/src/+/3671447/3/content/web_test/browser/web_test_browser_main_runner.cc https://chromium-review.googlesource.com/c/chromium/src/+/3546261

We need to map :443 to the WPT port because of the root manifest part of the FedCM spec: https://fedidcg.github.io/FedCM/#check-the-root-manifest

[jgraham]

So AFAICT this is defacto adding a new wpt server that's on port 443, but only accessible to Chrome? If that understanding is correct we can't do this.

Would it work to make this use the recently added PAC support?

[cbiesinger]

Oh, I didn't realize PAC support was added. Can you point me to the code?

[cbiesinger]

(I've since found ddeae538bbc9d634c983238fceea89ff08d00a86 and am working on updating this PR now)

[cbiesinger]

Closing this, I'll do this differently