Add a force-offline header to the download page open request.

Add a force-offline header to the download page open request.
This will force offline copy to be loaded even when device is online.

BUG=630817
Committed: https://crrev.com/76dda65295540570a8d35f6cc5cc491283fd41cd
Cr-Commit-Position: refs/heads/master@{#412070}

[Dmitry Titov, 2016-08-15 21:23:00]

dimich@chromium.org changed reviewers:
+ jianli@chromium.org

[jianli, 2016-08-15 21:30:44]

lgtm

[Dmitry Titov, 2016-08-15 21:38:00]

The CQ bit was checked by dimich@chromium.org

[commit-bot: I haz the power, 2016-08-15 21:38:21]

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, 2016-08-15 22:19:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-15 22:24:27]

Description was changed from

==========
Add a force-offline header to the download page open request.
This will force offline copy to be loaded even when device is online.

BUG=630817
==========

to

==========
Add a force-offline header to the download page open request.
This will force offline copy to be loaded even when device is online.

BUG=630817

Committed: https://crrev.com/76dda65295540570a8d35f6cc5cc491283fd41cd
Cr-Commit-Position: refs/heads/master@{#412070}
==========

[commit-bot: I haz the power, 2016-08-15 22:24:28]

Patchset 1 (id:??) landed as
https://crrev.com/76dda65295540570a8d35f6cc5cc491283fd41cd
Cr-Commit-Position: refs/heads/master@{#412070}