[translate] Declare additional timers in histograms.xml.

[translate] Declare additional timers in histograms.xml.

This CL declares TranslateRanker.Timer.ReadModel and
TranslateRanker.Timer.WriteModel, which capture the time
taken to read a model from local storage and commit a
model to local storage, respectively. This will allow the
UMA dashboard to visualize these metrics.

This CL also updates the descriptive text for the other
translate ranker model loader timer metrics, to be more
explicit about which class generates the metric.

BUG=646711
Review-Url: https://codereview.chromium.org/2877383003
Cr-Commit-Position: refs/heads/master@{#472804}
Committed: https://chromium.googlesource.com/chromium/src/+/d9203d77503397b78d699d5b8d0686f7d74f8416

[Roger McFarlane (Chromium), 2017-05-15 20:07:04]

Patchset #1 (id:1) has been deleted

[Roger McFarlane (Chromium), 2017-05-15 20:07:48]

rogerm@chromium.org changed reviewers:
+ hamelphi@chromium.org, jwd@chromium.org

[Roger McFarlane (Chromium), 2017-05-15 20:07:48]

PTAL.

[hamelphi, 2017-05-15 20:54:13]

lgtm

[Roger McFarlane (Chromium), 2017-05-16 18:08:39]

jwd@: ping?

[jwd, 2017-05-16 22:26:06]

lgtm

[Roger McFarlane (Chromium), 2017-05-17 18:16:18]

The CQ bit was checked by rogerm@chromium.org

[commit-bot: I haz the power, 2017-05-17 18:17:51]

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, 2017-05-18 02:36:12]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-18 02:36:13]

Try jobs failed on following builders:
  win_chromium_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[Roger McFarlane (Chromium), 2017-05-18 13:53:10]

The CQ bit was checked by rogerm@chromium.org

[commit-bot: I haz the power, 2017-05-18 13:53:33]

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, 2017-05-18 14:54:15]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1495115590911560,
"parent_rev": "82f80d61621c5017b9193543add343cab98adb6b", "commit_rev":
"d9203d77503397b78d699d5b8d0686f7d74f8416"}

[commit-bot: I haz the power, 2017-05-18 14:54:29]

Description was changed from

==========
[translate] Declare additional timers in histograms.xml.

This CL declares TranslateRanker.Timer.ReadModel and
TranslateRanker.Timer.WriteModel, which capture the time
taken to read a model from local storage and commit a
model to local storage, respectively. This will allow the
UMA dashboard to visualize these metrics.

This CL also updates the descriptive text for the other
translate ranker model loader timer metrics, to be more
explicit about which class generates the metric.

BUG=646711
==========

to

==========
[translate] Declare additional timers in histograms.xml.

This CL declares TranslateRanker.Timer.ReadModel and
TranslateRanker.Timer.WriteModel, which capture the time
taken to read a model from local storage and commit a
model to local storage, respectively. This will allow the
UMA dashboard to visualize these metrics.

This CL also updates the descriptive text for the other
translate ranker model loader timer metrics, to be more
explicit about which class generates the metric.

BUG=646711

Review-Url: https://codereview.chromium.org/2877383003
Cr-Commit-Position: refs/heads/master@{#472804}
Committed:
https://chromium.googlesource.com/chromium/src/+/d9203d77503397b78d699d5b8d06...
==========

[commit-bot: I haz the power, 2017-05-18 14:54:30]

Committed patchset #1 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/d9203d77503397b78d699d5b8d06...