Revert "Revert "buffet: Forcibly refresh access token when handling HTTP error 401.""

This reverts commit ae9cd381e9dc1113052a1db34ba03b945350cef2.

Change-Id: I98c8f22cc81fa859b397af3cb45374a0c9a04ce4
Reviewed-on: https://chromium-review.googlesource.com/260435
Reviewed-by: Aaron Kemp <kemp@google.com>
Commit-Queue: Garret Kelly <gdk@chromium.org>
Tested-by: Garret Kelly <gdk@chromium.org>
2 files changed