Make Site Engagement behave for adding 0 points.

Make Site Engagement behave for adding 0 points.

This CL changes the site engagement service to allow adding 0 points as
a no-op. This will allow us to turn off engagement sources via Finch by
setting them to 0.

BUG=642265
Committed: https://crrev.com/f73cdba299e7e52a15d6bffbf874a94732dc47cb
Cr-Commit-Position: refs/heads/master@{#416488}

[calamity, 2016-09-02 06:31:36]

calamity@chromium.org changed reviewers:
+ dominickn@chromium.org

[dominickn, 2016-09-02 06:37:01]

lgtm

[calamity, 2016-09-05 01:59:32]

The CQ bit was checked by calamity@chromium.org

[commit-bot: I haz the power, 2016-09-05 01:59:39]

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, 2016-09-05 02:46:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-05 02:48:22]

Description was changed from

==========
Make Site Engagement behave for adding 0 points.

This CL changes the site engagement service to allow adding 0 points as
a no-op. This will allow us to turn off engagement sources via Finch by
setting them to 0.

BUG=642265
==========

to

==========
Make Site Engagement behave for adding 0 points.

This CL changes the site engagement service to allow adding 0 points as
a no-op. This will allow us to turn off engagement sources via Finch by
setting them to 0.

BUG=642265

Committed: https://crrev.com/f73cdba299e7e52a15d6bffbf874a94732dc47cb
Cr-Commit-Position: refs/heads/master@{#416488}
==========

[commit-bot: I haz the power, 2016-09-05 02:48:23]

Patchset 1 (id:??) landed as
https://crrev.com/f73cdba299e7e52a15d6bffbf874a94732dc47cb
Cr-Commit-Position: refs/heads/master@{#416488}