Add ParseStartToFirstContentfulPaint metric to @import css scanner

Add ParseStartToFirstContentfulPaint metric to @import css scanner

We currently only have parse start to first meaningful paint. Since the
metric is still experimental let's make sure the experiment has at least
one stable metric.

BUG=596676
Committed: https://crrev.com/9ca202f973a177b0a02343cfbab213b85a67728b
Cr-Commit-Position: refs/heads/master@{#428784}

[Charlie Harrison, 2016-10-31 17:18:41]

The CQ bit was checked by csharrison@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-31 17:19:05]

Dry run: 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, 2016-10-31 17:48:31]

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

[commit-bot: I haz the power, 2016-10-31 17:48:32]

Dry run: Try jobs failed on following builders:
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)

[Charlie Harrison, 2016-10-31 17:54:26]

csharrison@chromium.org changed reviewers:
+ bmcquade@chromium.org

[Charlie Harrison, 2016-10-31 17:54:26]

bmcquade, ptal?

[Bryan McQuade, 2016-10-31 17:56:26]

lgtm

[Charlie Harrison, 2016-10-31 18:04:05]

The CQ bit was checked by csharrison@chromium.org

[commit-bot: I haz the power, 2016-10-31 18:04:30]

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, 2016-10-31 18:14:16]

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

[commit-bot: I haz the power, 2016-10-31 18:14:17]

Try jobs failed on following builders:
  chromium_presubmit on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Charlie Harrison, 2016-10-31 18:25:45]

csharrison@chromium.org changed reviewers:
+ isherman@chromium.org

[Charlie Harrison, 2016-10-31 18:25:46]

oops, +isherman for histograms.xml

[Ilya Sherman, 2016-10-31 19:54:58]

lgtm

[Charlie Harrison, 2016-10-31 19:55:21]

The CQ bit was checked by csharrison@chromium.org

[Ilya Sherman, 2016-10-31 19:55:27]

The CQ bit was checked by isherman@chromium.org

[commit-bot: I haz the power, 2016-10-31 19:56:03]

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, 2016-10-31 20:24:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-31 20:27:02]

Description was changed from

==========
Add ParseStartToFirstContentfulPaint metric to @import css scanner

We currently only have parse start to first meaningful paint. Since the
metric is still experimental let's make sure the experiment has at least
one stable metric.

BUG=596676
==========

to

==========
Add ParseStartToFirstContentfulPaint metric to @import css scanner

We currently only have parse start to first meaningful paint. Since the
metric is still experimental let's make sure the experiment has at least
one stable metric.

BUG=596676

Committed: https://crrev.com/9ca202f973a177b0a02343cfbab213b85a67728b
Cr-Commit-Position: refs/heads/master@{#428784}
==========

[commit-bot: I haz the power, 2016-10-31 20:27:03]

Patchset 1 (id:??) landed as
https://crrev.com/9ca202f973a177b0a02343cfbab213b85a67728b
Cr-Commit-Position: refs/heads/master@{#428784}