This shows progress for work which happens after the migration suggestions have
been generated. This work is generating instrumentation details for the front
end.
When migrating the analyzer package, the progress indicated by this third
progress bar takes approximately the same time as generating suggestions (on
the same order of magnitude).
Fixes https://github.com/dart-lang/sdk/issues/44074
Change-Id: I0b40dd5e587b718bd1ef56d64f03929924cc430a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170563
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>
Devon Carew