Make PageLoadMetricsObserver::OnStart return ObservePolicy

Make PageLoadMetricsObserver::OnStart return ObservePolicy

BUG=647764
Committed: https://crrev.com/46595f8ee5878368274f99c9821940897c74b277
Cr-Commit-Position: refs/heads/master@{#422567}

[Charlie Harrison, 2016-10-03 21:25:28]

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

[commit-bot: I haz the power, 2016-10-03 21:26:27]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Charlie Harrison, 2016-10-03 21:26:55]

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

[Charlie Harrison, 2016-10-03 21:26:56]

bmcquade, PTAL? Sorry for the delay on this one.

[Bryan McQuade, 2016-10-03 22:08:16]

LGTM, thanks!

[Charlie Harrison, 2016-10-03 22:08:56]

The CQ bit was unchecked by csharrison@chromium.org

[Charlie Harrison, 2016-10-03 22:08:56]

The CQ bit was checked by csharrison@chromium.org

[commit-bot: I haz the power, 2016-10-03 22:09:24]

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, 2016-10-03 22:28:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-03 22:30:39]

Description was changed from

==========
Make PageLoadMetricsObserver::OnStart return ObservePolicy

BUG=647764
==========

to

==========
Make PageLoadMetricsObserver::OnStart return ObservePolicy

BUG=647764

Committed: https://crrev.com/46595f8ee5878368274f99c9821940897c74b277
Cr-Commit-Position: refs/heads/master@{#422567}
==========

[commit-bot: I haz the power, 2016-10-03 22:30:41]

Patchset 1 (id:??) landed as
https://crrev.com/46595f8ee5878368274f99c9821940897c74b277
Cr-Commit-Position: refs/heads/master@{#422567}