Revert to the old back arrow style with NavigationBar

Revert to the old back arrow style with NavigationBar

MDC has a method to use the old style, but it's in a private component
and the wind is blowing towards removing it at some point, so this CL
just opt-s out of MDC driving the back button in Settings.

I still filed a request at MDC to have the method public, but it might
never come, or they might remove the old style before that.

BUG=none
R=sdefresne@chromium.org

Committed: https://crrev.com/66b3060d0e1b646a1a09ec1b7f26358ab71fddf8
Cr-Commit-Position: refs/heads/master@{#439776}

[lpromero, 2016-12-20 12:08:01]

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

[commit-bot: I haz the power, 2016-12-20 12:08:06]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[sdefresne, 2016-12-20 12:13:41]

lgtm

[commit-bot: I haz the power, 2016-12-20 12:19:05]

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

[commit-bot: I haz the power, 2016-12-20 12:19:06]

Dry run: This issue passed the CQ dry run.

[lpromero, 2016-12-20 12:32:12]

The CQ bit was checked by lpromero@chromium.org

[commit-bot: I haz the power, 2016-12-20 12:32:26]

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, 2016-12-20 12:35:53]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1482237132699330, "parent_rev":
"91fad40f7f8d3ecdeb430ca8ef17f7e19b84b200", "commit_rev":
"6fd40c4fe5e7d3e784ca3874701b4eb7e4f1164f"}

[commit-bot: I haz the power, 2016-12-20 12:36:21]

Description was changed from

==========
Revert to the old back arrow style with NavigationBar

MDC has a method to use the old style, but it's in a private component
and the wind is blowing towards removing it at some point, so this CL
just opt-s out of MDC driving the back button in Settings.

I still filed a request at MDC to have the method public, but it might
never come, or they might remove the old style before that.

BUG=none
R=sdefresne@chromium.org
==========

to

==========
Revert to the old back arrow style with NavigationBar

MDC has a method to use the old style, but it's in a private component
and the wind is blowing towards removing it at some point, so this CL
just opt-s out of MDC driving the back button in Settings.

I still filed a request at MDC to have the method public, but it might
never come, or they might remove the old style before that.

BUG=none
R=sdefresne@chromium.org

Review-Url: https://codereview.chromium.org/2589193002
==========

[commit-bot: I haz the power, 2016-12-20 12:36:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-20 12:38:25]

Description was changed from

==========
Revert to the old back arrow style with NavigationBar

MDC has a method to use the old style, but it's in a private component
and the wind is blowing towards removing it at some point, so this CL
just opt-s out of MDC driving the back button in Settings.

I still filed a request at MDC to have the method public, but it might
never come, or they might remove the old style before that.

BUG=none
R=sdefresne@chromium.org

Review-Url: https://codereview.chromium.org/2589193002
==========

to

==========
Revert to the old back arrow style with NavigationBar

MDC has a method to use the old style, but it's in a private component
and the wind is blowing towards removing it at some point, so this CL
just opt-s out of MDC driving the back button in Settings.

I still filed a request at MDC to have the method public, but it might
never come, or they might remove the old style before that.

BUG=none
R=sdefresne@chromium.org

Committed: https://crrev.com/66b3060d0e1b646a1a09ec1b7f26358ab71fddf8
Cr-Commit-Position: refs/heads/master@{#439776}
==========

[commit-bot: I haz the power, 2016-12-20 12:38:26]

Patchset 1 (id:??) landed as
https://crrev.com/66b3060d0e1b646a1a09ec1b7f26358ab71fddf8
Cr-Commit-Position: refs/heads/master@{#439776}