tree f8ee04fb074e30542c8745dad511605afd83038b
parent 9a225c02d1f78511f44bc9abdeea07fb9bfe011b
author Prathmesh Prabhu <pprabhu@chromium.org> 1515698154 -0800
committer chrome-bot <chrome-bot@chromium.org> 1515825473 -0800

Improve metrics from label_cleaner.

label_cleaner's metrics were slightly wrong -- we were never reporting
all the existing labels, and misreporting the prefix-matched labels
under "all".

While there,
- add a dry-run option to test stuff
- add options to pass in database user/password etc from commandline.

BUG=chromium:753134
TEST=Run in dry-run mode.

Change-Id: Ieeca75af725b27e46277589a7a62afe35d63765b
Reviewed-on: https://chromium-review.googlesource.com/862196
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>