Add more metrics for VideoPersistence.

Add more metrics for VideoPersistence.

BUG=703742
R=isherman@chromium.org

Review-Url: https://codereview.chromium.org/2769443002
Cr-Commit-Position: refs/heads/master@{#458594}
Committed: https://chromium.googlesource.com/chromium/src/+/a5e47761320d73c02ae0473936e059769c42df15

[mlamouri (slow - plz ping), 2017-03-21 20:10:46]

PTAL :)

[Ilya Sherman, 2017-03-21 21:42:56]

LGTM % a nit:

https://codereview.chromium.org/2769443002/diff/1/tools/metrics/histograms/hi...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/2769443002/diff/1/tools/metrics/histograms/hi...
tools/metrics/histograms/histograms.xml:113198: +  <int value="8"
label="Success"/>
nit: I'd suggest ordering "Success" to be first.  That way, if you ever add
additional error cases, it doesn't end up buried in the middle.

[mlamouri (slow - plz ping), 2017-03-21 21:55:38]

The CQ bit was checked by mlamouri@chromium.org

[mlamouri (slow - plz ping), 2017-03-21 21:55:39]

The patchset sent to the CQ was uploaded after l-g-t-m from
isherman@chromium.org
Link to the patchset: https://codereview.chromium.org/2769443002/#ps20001
(title: "review comments")

[commit-bot: I haz the power, 2017-03-21 21:56:03]

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, 2017-03-21 23:04:11]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1490133338739850,
"parent_rev": "6f15a2dc3a3b9bd111352a58c40cf1a1ea0e9652", "commit_rev":
"a5e47761320d73c02ae0473936e059769c42df15"}

[commit-bot: I haz the power, 2017-03-21 23:04:59]

Description was changed from

==========
Add more metrics for VideoPersistence.

BUG=703742
R=isherman@chromium.org
==========

to

==========
Add more metrics for VideoPersistence.

BUG=703742
R=isherman@chromium.org

Review-Url: https://codereview.chromium.org/2769443002
Cr-Commit-Position: refs/heads/master@{#458594}
Committed:
https://chromium.googlesource.com/chromium/src/+/a5e47761320d73c02ae0473936e0...
==========

[commit-bot: I haz the power, 2017-03-21 23:05:00]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/a5e47761320d73c02ae0473936e0...