[ios] Do not use CRWWebController in MainController.

[ios] Do not use CRWWebController in MainController.

New code uses web::NavigationManager which is the same program flow.
Old code would tolerate nil CRWWebController, while the new code will
crash (which should not happen in practice).

BUG=616288
Committed: https://crrev.com/d4e617ae3c13cb02ac784df04deb8e44b82de395
Cr-Commit-Position: refs/heads/master@{#440854}

[Eugene But (OOO till 7-30), 2016-12-27 19:41:11]

Description was changed from

==========
[ios] Do not use CRWWebController in MainController.

New code uses web::NavigationManager which is the same program flow.
Old code would tolerate nil CRWWebController, while the new code will
crash (which should not happen in practice).

BUG=
==========

to

==========
[ios] Do not use CRWWebController in MainController.

New code uses web::NavigationManager which is the same program flow.
Old code would tolerate nil CRWWebController, while the new code will
crash (which should not happen in practice).

BUG=616288
==========

[Eugene But (OOO till 7-30), 2016-12-27 20:43:38]

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

[marq (ping after 24h), 2016-12-28 09:37:56]

lgtm

[Eugene But (OOO till 7-30), 2016-12-28 16:36:32]

The CQ bit was checked by eugenebut@chromium.org

[commit-bot: I haz the power, 2016-12-28 16:36:36]

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, 2016-12-28 16:45:28]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1482942992616100, "parent_rev":
"e48eab87411ae9fed13d5efb9f4d7b8d39a08206", "commit_rev":
"2dc5fc44ff191eadc18e5948f24bc87140507f8a"}

[commit-bot: I haz the power, 2016-12-28 16:45:56]

Description was changed from

==========
[ios] Do not use CRWWebController in MainController.

New code uses web::NavigationManager which is the same program flow.
Old code would tolerate nil CRWWebController, while the new code will
crash (which should not happen in practice).

BUG=616288
==========

to

==========
[ios] Do not use CRWWebController in MainController.

New code uses web::NavigationManager which is the same program flow.
Old code would tolerate nil CRWWebController, while the new code will
crash (which should not happen in practice).

BUG=616288

Review-Url: https://codereview.chromium.org/2600963002
==========

[commit-bot: I haz the power, 2016-12-28 16:45:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2017-01-02 15:49:10]

Description was changed from

==========
[ios] Do not use CRWWebController in MainController.

New code uses web::NavigationManager which is the same program flow.
Old code would tolerate nil CRWWebController, while the new code will
crash (which should not happen in practice).

BUG=616288

Review-Url: https://codereview.chromium.org/2600963002
==========

to

==========
[ios] Do not use CRWWebController in MainController.

New code uses web::NavigationManager which is the same program flow.
Old code would tolerate nil CRWWebController, while the new code will
crash (which should not happen in practice).

BUG=616288

Committed: https://crrev.com/d4e617ae3c13cb02ac784df04deb8e44b82de395
Cr-Commit-Position: refs/heads/master@{#440854}
==========

[commit-bot: I haz the power, 2017-01-02 15:49:11]

Patchset 1 (id:??) landed as
https://crrev.com/d4e617ae3c13cb02ac784df04deb8e44b82de395
Cr-Commit-Position: refs/heads/master@{#440854}