Call WebStateObserver::ProvisionalNavigationStarted for state navigations

Call WebStateObserver::ProvisionalNavigationStarted for state navigations

ProvisionalNavigationStarted goes in pair with DidFinishNavigation,
which is called for push and replace state operations.

BUG=713836
Review-Url: https://codereview.chromium.org/2873023002
Cr-Commit-Position: refs/heads/master@{#470723}
Committed: https://chromium.googlesource.com/chromium/src/+/670d9f911edaeba050e8077861129c6d3f48496a

[Eugene But (OOO till 7-30), 2017-05-10 01:08:20]

eugenebut@chromium.org changed reviewers:
+ kkhorimoto@chromium.org

[kkhorimoto, 2017-05-10 17:46:33]

lgtm

[Eugene But (OOO till 7-30), 2017-05-10 21:18:23]

The CQ bit was checked by eugenebut@chromium.org

[Eugene But (OOO till 7-30), 2017-05-10 21:18:23]

The patchset sent to the CQ was uploaded after l-g-t-m from
kkhorimoto@chromium.org
Link to the patchset: https://codereview.chromium.org/2873023002/#ps20001
(title: "Rebased")

[commit-bot: I haz the power, 2017-05-10 21:20:04]

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, 2017-05-10 21:55:19]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1494451103009550,
"parent_rev": "7b14a47b548f3d100a6bd6b163832b71e0236afd", "commit_rev":
"670d9f911edaeba050e8077861129c6d3f48496a"}

[commit-bot: I haz the power, 2017-05-10 21:55:26]

Description was changed from

==========
Call WebStateObserver::ProvisionalNavigationStarted for state navigations

ProvisionalNavigationStarted goes in pair with DidFinishNavigation,
which is called for push and replace state operations.

BUG=713836
==========

to

==========
Call WebStateObserver::ProvisionalNavigationStarted for state navigations

ProvisionalNavigationStarted goes in pair with DidFinishNavigation,
which is called for push and replace state operations.

BUG=713836

Review-Url: https://codereview.chromium.org/2873023002
Cr-Commit-Position: refs/heads/master@{#470723}
Committed:
https://chromium.googlesource.com/chromium/src/+/670d9f911edaeba050e807786112...
==========

[commit-bot: I haz the power, 2017-05-10 21:55:27]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/670d9f911edaeba050e807786112...