tree 19f87eabf21e42381e41a586fe5757c2f831bc17
parent fd158294daa6061037ca564e21818a49ee56fc94
author Luigi Semenzato <semenzato@chromium.org> 1393444396 -0800
committer chrome-internal-fetch <chrome-internal-fetch@google.com> 1394826170 +0000

metrics: refactor counters

The metrics daemon had counter classes that represented
persistent, tagged values, and UMA stats.  To create some
derived UMA stats we need to separate persistency and UMA stats,
and the tagging doesn't help either.

This rewrite is supposed to keep the same functionality.

BUG=chromium:339588
TEST=ran and checked a few histograms
BRANCH=none

Change-Id: Ia1121ab2db391d71edffab9f52afe29ce17686ba
Reviewed-on: https://chromium-review.googlesource.com/188082
Tested-by: Luigi Semenzato <semenzato@chromium.org>
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Commit-Queue: Luigi Semenzato <semenzato@chromium.org>