Revert of Make AXProviderTest.HelloWorld bail without oopifs.

Revert of Make AXProviderTest.HelloWorld bail without oopifs. (patchset #1 id:1 of https://codereview.chromium.org/1224103002/)

Reason for revert:
Sadrul landed a fix for the flaky timeouts:
  https://codereview.chromium.org/1228173003
Bailing didn't resolve these flakes anyway.

Original issue's description:
> Make AXProviderTest.HelloWorld bail without oopifs.
>
> This test times out flakily without oopifs enabled.
> Effectively disable the test without oopifs for now.
> This should unblock running apptests on the CQ/main.
>
> BUG=504917
> TEST=Test isn't run without oopifs for now...
> R=jam@chromium.org
> TBR=sky@chromium.org
>
> Committed: https://crrev.com/427c2f36770711c369a85f56c4a63b4036e735a9
> Cr-Commit-Position: refs/heads/master@{#338073}

TBR=jam@chromium.org,sky@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=504917
Committed: https://crrev.com/6517a6cf6e09242c553a28e5c175cb59920a694e
Cr-Commit-Position: refs/heads/master@{#339722}

[msw, 2015-07-21 19:41:36]

Created Revert of Make AXProviderTest.HelloWorld bail without oopifs.

[commit-bot: I haz the power, 2015-07-21 19:42:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1248873002/1

[commit-bot: I haz the power, 2015-07-21 19:44:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-21 19:49:25]

Patchset 1 (id:??) landed as
https://crrev.com/6517a6cf6e09242c553a28e5c175cb59920a694e
Cr-Commit-Position: refs/heads/master@{#339722}