The content browser test NavigationHandleImplBrowserTest.RedirectToRendererDebugUrl fails with the network service and should be fixed.
This test validates that redirects to a chrome URL are blocked.
It seems in the network service case we won't block redirect to chrome URLs.
For instance:
https://tinyurl.com/3lj5h3l
that redirects to chrome://settings It fails somehow but it looks like the redirect does happen.

Note that the blocking should happen for navigations and subresources.
clamy@ suggested to provide a list of schemes to the network service when  created for which we would block redirects to.