commit bd773d38a6424729d25cd8683fc8d6d9706d89c8
author Alexander Thomas <athom@google.com> Wed Nov 11 12:32:38 2020 +0100
committer commit-bot@chromium.org <commit-bot@chromium.org> Thu Nov 12 08:52:56 2020 +0000
tree 87ab4d34afc90833183c95056dfb59f9eea245f0
parent 4d54e67baba915185ccdbfe29888286cc51d4e32

[cbuild] Add support for regression data

If the cbuild sends a JSON message in the form below, it will be parsed
and additional information will be sent to Gerrit.

```json
{
  "result" : false,
  "regression": true
}
```

The status message in Gerrit will then say
"FAILURE (REGRESSIONS DETECTED)" if regression is `true` or
"FAILURE (NO REGRESSIONS DETECTED)" when regression is `false`.

Legacy results are not changed, but support for them will be removed in
a follow-up CL once they are drained from Cloud Storage and the cbuild
service is switched to provide the new format.

Bug:b/167667100
Change-Id: I7f48ca5cfbb7d7b15a213f7a0ab4f05a3fca5b1a
Reviewed-on: https://dart-review.googlesource.com/c/recipes/+/171560
Reviewed-by: Karl Klose <karlklose@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>