gaia_auth_fetcher timeout in browser_tests

[Andrew Brown]

I'm writing a new extension test (or a couple new extension tests) in support of https://chromium-review.googlesource.com/c/chromium/src/+/5273743.

Currently, running my new test locally, on Ubuntu 25.04, it always times out. (I haven't uploaded the test to review yet because it's not working and I have no idea whether it's even testing the right thing if I can't run it.) There's some indication that the problem stems from `gaia_auth_fetcher.cc`, which logs "Authentication request failed" repeatedly, on an increasing timer, until the test dies. The exact error gaia gets is net::ERR_NAME_NOT_RESOLVED.

My understanding of gaia is it's the thing that deals with logging into the browser itself with a google account. I would have thought that's the sort of thing that would be expected to not work in an extensions browsertest, but apparently not. Any advice on how to actually resolve this issue and proceed with writing my test would be hugely appreciated :)

[Andrew Brown]

Hmm, an update: it seems the gaia_auth_fetcher failures also occur in other, successful tests I've been looking at, so it's probably actually unrelated to the source of the timeouts. I'm looking more into it now -- sorry to bother.