Fix the computation of the usage metric in UserClassifier.

Fix the computation of the usage metric.

Before this CL, the computation in UserClassifier::UpdateMetricOnEvent() did not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200
Committed: https://crrev.com/452fd4f3321cfd3ade96518e53ac236969a90a75
Cr-Commit-Position: refs/heads/master@{#419437}

[jkrcal, 2016-09-19 11:22:28]

Description was changed from

==========
Fix the computation of the usage metric.

The computation in UserClassifier::UpdateMetricOnEvent() does not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200
==========

to

==========
Fix the computation of the usage metric.

The computation in UserClassifier::UpdateMetricOnEvent() does not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200
==========

[jkrcal, 2016-09-19 11:24:49]

jkrcal@chromium.org changed reviewers:
+ treib@chromium.org

[jkrcal, 2016-09-19 11:24:49]

Hey, Marc, could you PTAL at this one missing "-" sign?
 (Bernhard who reviewed it originally is ooo)

[Marc Treib, 2016-09-19 11:37:52]

lgtm

Description nit: If you describe the state before this CL, I prefer past tense
(or, to be even clearer, explicitly say "before this CL...").

[jkrcal, 2016-09-19 11:40:49]

Description was changed from

==========
Fix the computation of the usage metric.

The computation in UserClassifier::UpdateMetricOnEvent() does not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200
==========

to

==========
Fix the computation of the usage metric.

Before this CL, the computation in UserClassifier::UpdateMetricOnEvent() did not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200
==========

[jkrcal, 2016-09-19 11:40:55]

The CQ bit was checked by jkrcal@chromium.org

[commit-bot: I haz the power, 2016-09-19 11:41:07]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-19 12:29:16]

Description was changed from

==========
Fix the computation of the usage metric.

Before this CL, the computation in UserClassifier::UpdateMetricOnEvent() did not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200
==========

to

==========
Fix the computation of the usage metric.

Before this CL, the computation in UserClassifier::UpdateMetricOnEvent() did not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200
==========

[commit-bot: I haz the power, 2016-09-19 12:29:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-19 12:31:47]

Description was changed from

==========
Fix the computation of the usage metric.

Before this CL, the computation in UserClassifier::UpdateMetricOnEvent() did not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200
==========

to

==========
Fix the computation of the usage metric.

Before this CL, the computation in UserClassifier::UpdateMetricOnEvent() did not
reflect the math outlined in the same function.

This CL fixes the problem.

BUG=648200

Committed: https://crrev.com/452fd4f3321cfd3ade96518e53ac236969a90a75
Cr-Commit-Position: refs/heads/master@{#419437}
==========

[commit-bot: I haz the power, 2016-09-19 12:31:47]

Patchset 1 (id:??) landed as
https://crrev.com/452fd4f3321cfd3ade96518e53ac236969a90a75
Cr-Commit-Position: refs/heads/master@{#419437}