Revert of [ios] Removed back-forward navigation API from CRWWebController.

Revert of [ios] Removed back-forward navigation API from CRWWebController. (patchset #2 id:20001 of https://codereview.chromium.org/2499593003/ )

Reason for revert:
Breaks upstream unit test.

Original issue's description:
> [ios] Removed back-forward navigation API from CRWWebController.
>
> NavigationManager API should be used for navigation instead.
>
> BUG=661316
>
> Committed: https://crrev.com/f00c143bc322f36f5ff919620fd57b2e021a3262
> Cr-Commit-Position: refs/heads/master@{#432369}

TBR=kkhorimoto@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=661316
Committed: https://crrev.com/862c1088fa95986676931fcf7231fcbd6d182fe4
Cr-Commit-Position: refs/heads/master@{#432372}

[Eugene But (OOO till 7-30), 2016-11-16 03:42:12]

The CQ bit was checked by eugenebut@chromium.org

[Eugene But (OOO till 7-30), 2016-11-16 03:42:12]

Created Revert of [ios] Removed back-forward navigation API from
CRWWebController.

[commit-bot: I haz the power, 2016-11-16 03:43:02]

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, 2016-11-16 03:46:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-16 03:51:47]

Description was changed from

==========
Revert of [ios] Removed back-forward navigation API from CRWWebController.
(patchset #2 id:20001 of https://codereview.chromium.org/2499593003/ )

Reason for revert:
Breaks upstream unit test.

Original issue's description:
> [ios] Removed back-forward navigation API from CRWWebController.
> 
> NavigationManager API should be used for navigation instead.
> 
> BUG=661316
> 
> Committed: https://crrev.com/f00c143bc322f36f5ff919620fd57b2e021a3262
> Cr-Commit-Position: refs/heads/master@{#432369}

TBR=kkhorimoto@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=661316
==========

to

==========
Revert of [ios] Removed back-forward navigation API from CRWWebController.
(patchset #2 id:20001 of https://codereview.chromium.org/2499593003/ )

Reason for revert:
Breaks upstream unit test.

Original issue's description:
> [ios] Removed back-forward navigation API from CRWWebController.
>
> NavigationManager API should be used for navigation instead.
>
> BUG=661316
>
> Committed: https://crrev.com/f00c143bc322f36f5ff919620fd57b2e021a3262
> Cr-Commit-Position: refs/heads/master@{#432369}

TBR=kkhorimoto@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=661316

Committed: https://crrev.com/862c1088fa95986676931fcf7231fcbd6d182fe4
Cr-Commit-Position: refs/heads/master@{#432372}
==========

[commit-bot: I haz the power, 2016-11-16 03:51:47]

Patchset 1 (id:??) landed as
https://crrev.com/862c1088fa95986676931fcf7231fcbd6d182fe4
Cr-Commit-Position: refs/heads/master@{#432372}

[Eugene But (OOO till 7-30), 2016-11-16 14:52:04]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2505013002/ by eugenebut@chromium.org.

The reason for reverting is: Downstream tests were fixed. Relanding without
changes..