Fix tab presentation metrics

Fix tab presentation metrics

BUG=724682
Review-Url: https://codereview.chromium.org/2952433002
Cr-Commit-Position: refs/heads/master@{#481590}
Committed: https://chromium.googlesource.com/chromium/src/+/9f1b6e0775d4a97df66d39197df9c6a01a41539b

[PL, 2017-06-20 00:17:15]

peterlaurens@chromium.org changed reviewers:
+ rohitrao@chromium.org

[PL, 2017-06-20 00:17:16]

Hi Rohit,

I made some errors with the initial implementation of this metric, a typo and an
issue that niled out a histogram block before it could be run.

This fixes those issues, thanks!

- PL

[rohitrao (ping after 24h), 2017-06-21 01:02:09]

lgtm

Sorry, I looked at this yesterday and then never hit send.

[PL, 2017-06-22 17:34:20]

The CQ bit was checked by peterlaurens@chromium.org

[commit-bot: I haz the power, 2017-06-22 17:34:38]

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, 2017-06-22 17:46:50]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498152860819150, "parent_rev":
"d16bada7708d2fff08b0e48608d545621a1e8bef", "commit_rev":
"9f1b6e0775d4a97df66d39197df9c6a01a41539b"}

[commit-bot: I haz the power, 2017-06-22 17:47:08]

Description was changed from

==========
Fix tab presentation metrics

BUG=724682
==========

to

==========
Fix tab presentation metrics

BUG=724682

Review-Url: https://codereview.chromium.org/2952433002
Cr-Commit-Position: refs/heads/master@{#481590}
Committed:
https://chromium.googlesource.com/chromium/src/+/9f1b6e0775d4a97df66d39197df9...
==========

[commit-bot: I haz the power, 2017-06-22 17:47:09]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/9f1b6e0775d4a97df66d39197df9...