Remove unused using content::ResourceType

Remove unused using content::ResourceType

BUG=none

[tyoshino (SeeGerritForStatus), 2016-11-08 07:05:36]

Description was changed from

==========
Remove unused using content::ResourceType

BUG=none
==========

to

==========
Remove unused using content::ResourceType

BUG=none
==========

[tyoshino (SeeGerritForStatus), 2016-11-08 07:05:36]

tyoshino@chromium.org changed reviewers:
+ mmenke@chromium.org

[tyoshino (SeeGerritForStatus), 2016-11-08 07:05:45]

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

[commit-bot: I haz the power, 2016-11-08 07:05:56]

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, 2016-11-08 08:39:38]

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

[commit-bot: I haz the power, 2016-11-08 08:39:39]

Dry run: This issue passed the CQ dry run.

[tyoshino (SeeGerritForStatus), 2016-11-08 14:08:20]

I'll merge this into https://codereview.chromium.org/2487463004/ before commit.

[mmenke, 2016-11-08 14:17:54]

On 2016/11/08 14:08:20, tyoshino wrote:
> I'll merge this into https://codereview.chromium.org/2487463004/ before
commit.

LGTM