[ios] Removed goBack/goForward from CRWSessionController.

[ios] Removed goBack/goForward from CRWSessionController.

These methods are unused and CRWSessionController should be folded into
NavigationManager.

BUG=661316
Committed: https://crrev.com/54cd9dad1e908f83de618794b8ade832fa5db58f
Cr-Commit-Position: refs/heads/master@{#432593}

[Eugene But (OOO till 7-30), 2016-11-15 00:11:17]

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

[Eugene But (OOO till 7-30), 2016-11-15 00:11:25]

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

[commit-bot: I haz the power, 2016-11-15 00:12:10]

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, 2016-11-15 02:12:51]

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

[commit-bot: I haz the power, 2016-11-15 02:12:52]

Dry run: This issue passed the CQ dry run.

[kkhorimoto, 2016-11-16 02:31:36]

lgtm

[Eugene But (OOO till 7-30), 2016-11-16 18:28:44]

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

[commit-bot: I haz the power, 2016-11-16 18:29:21]

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, 2016-11-16 18:54:33]

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

[commit-bot: I haz the power, 2016-11-16 18:54:33]

Dry run: This issue passed the CQ dry run.

[Eugene But (OOO till 7-30), 2016-11-16 19:29:19]

The CQ bit was checked by eugenebut@chromium.org

[Eugene But (OOO till 7-30), 2016-11-16 19:29:20]

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/2498483002/#ps20001
(title: "Merged with origin/master")

[commit-bot: I haz the power, 2016-11-16 19:30:47]

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 19:37:34]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-11-16 19:53:45]

Description was changed from

==========
[ios] Removed goBack/goForward from CRWSessionController.

These methods are unused and CRWSessionController should be folded into
NavigationManager.

BUG=661316
==========

to

==========
[ios] Removed goBack/goForward from CRWSessionController.

These methods are unused and CRWSessionController should be folded into
NavigationManager.

BUG=661316

Committed: https://crrev.com/54cd9dad1e908f83de618794b8ade832fa5db58f
Cr-Commit-Position: refs/heads/master@{#432593}
==========

[commit-bot: I haz the power, 2016-11-16 19:53:49]

Patchset 2 (id:??) landed as
https://crrev.com/54cd9dad1e908f83de618794b8ade832fa5db58f
Cr-Commit-Position: refs/heads/master@{#432593}