Log foreground duration for failed provisional loads.

Log foreground duration for failed provisional loads.

UKM logs foreground duration for both committed and provisional loads.
This change makes core UMA metrics more consistent with UKM.

This metric will also help to measure the impact of the delayed navigation
experiment, where we expect there to be an increased number of
failed provisional loads.

BUG=705058
NOTRY=true
NOPRESUBMIT=true
TBR=csharrison

Review-Url: https://codereview.chromium.org/2771293002
Cr-Commit-Position: refs/heads/master@{#459576}
(cherry picked from commit 8db499251a795b754dbef05b1d73a5e877001da8)

[Bryan McQuade, 2017-03-29 02:54:22]

Description was changed from

==========
Log foreground duration for failed provisional loads.

UKM logs foreground duration for both committed and provisional loads.
This change makes core UMA metrics more consistent with UKM.

This metric will also help to measure the impact of the delayed navigation
experiment, where we expect there to be an increased number of
failed provisional loads.

BUG=705058

Review-Url: https://codereview.chromium.org/2771293002
Cr-Commit-Position: refs/heads/master@{#459576}
(cherry picked from commit 8db499251a795b754dbef05b1d73a5e877001da8)
==========

to

==========
Log foreground duration for failed provisional loads.

UKM logs foreground duration for both committed and provisional loads.
This change makes core UMA metrics more consistent with UKM.

This metric will also help to measure the impact of the delayed navigation
experiment, where we expect there to be an increased number of
failed provisional loads.

BUG=705058
NOTRY=true
NOPRESUBMIT=true
TBR=csharrison

Review-Url: https://codereview.chromium.org/2771293002
Cr-Commit-Position: refs/heads/master@{#459576}
(cherry picked from commit 8db499251a795b754dbef05b1d73a5e877001da8)
==========

[Bryan McQuade, 2017-03-29 05:23:46]

The CQ bit was checked by bmcquade@chromium.org

[commit-bot: I haz the power, 2017-03-29 05:24:16]

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, 2017-03-29 05:32:15]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490765026396730, "parent_rev":
"128bb90c2f866717712e2f0fdff29a18f61fc9d8", "commit_rev":
"07c2c1ae6884e80abcc5820f5fb74d49ba8d6ce3"}

[commit-bot: I haz the power, 2017-03-29 05:37:58]

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

[commit-bot: I haz the power, 2017-03-29 05:38:00]

Prior attempt to commit was detected, but we were not able to check whether the
issue was successfully committed. Please check Git history manually and re-check
CQ or close this issue as needed.