Revert of Reenable oobe spoken feedback test.

Revert of Reenable oobe spoken feedback test. (patchset #4 id:60001 of https://codereview.chromium.org/866713002/)

Reason for revert:
Still failing :(

http://build.chromium.org/p/chromium.memory/builders/Linux%20Chromium%20OS%20ASan%20LSan%20Tests%20%281%29/builds/6244

http://build.chromium.org/p/chromium.memory/builders/Linux%20Chromium%20OS%20ASan%20LSan%20Tests%20%281%29/builds/6247

Original issue's description:
> Reenable oobe spoken feedback test.
>
> The test was disabled because it was flaky.  This CL tries to address that
> and reenables the test.
>
> BUG=346797
> R=dtseng@chromium.org
>
> Committed: https://crrev.com/e03f042d1c76262248e42334b1d0326b0e4319e7
> Cr-Commit-Position: refs/heads/master@{#313467}

TBR=dtseng@chromium.org,dmazzoni@chromium.org,plundblad@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=346797
Committed: https://crrev.com/d65ea3868f1f9457061dfee03feac7495298b1cd
Cr-Commit-Position: refs/heads/master@{#313498}

[dconnelly, 2015-01-28 13:28:25]

Created Revert of Reenable oobe spoken feedback test.

[commit-bot: I haz the power, 2015-01-28 13:29:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/884643003/1

[commit-bot: I haz the power, 2015-01-28 13:29:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-28 13:31:49]

Patchset 1 (id:??) landed as
https://crrev.com/d65ea3868f1f9457061dfee03feac7495298b1cd
Cr-Commit-Position: refs/heads/master@{#313498}