Preserve proxy info on auth restart

crrev.com/c/1541164 made sure URLRequest::proxy_server_ was set on
certain error conditions. Here, we also make sure it is set when the
network transaction is retried due to a proxy auth failure.

Bug: 1197551
Change-Id: I9cf929142a50a5724e400cdee78977b8ceee9059
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2817984
Commit-Queue: Wojciech Dzier┼╝anowski <wdzierzanowski@opera.com>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#874028}
GitOrigin-RevId: 758b4fb26cf1ff7a9caf90c7d38325d75f264360
2 files changed