Previously when composing a debugging trace, it would use an
isinstance check to special-case inclusion of a gitcookies file.
This CL refactors this to be part of the Authenticator API, instead,
which means that we will always get some sort of authenticator log
file in a trace, even if it's empty.
This also provides an affordance to add debugging information for
the other authenticator types later.
R=ddoman@chromium.org, gavinmak@google.com
Bug: 336351842
Change-Id: Idd6f45ea60b089f9b2391b5527c5281f67421043
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5571497
Auto-Submit: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>
Commit-Queue: Yiwei Zhang <yiwzhang@google.com>
