Revert of Re-enabling fixed WebRTC getusermedia tests.

Revert of Re-enabling fixed WebRTC getusermedia tests. (patchset #1 id:1 of https://codereview.chromium.org/623733002/)

Reason for revert:
still flaky, see bug

Original issue's description:
> Re-enabling fixed WebRTC getusermedia tests.
>
> BUG=417756
>
> Committed: https://crrev.com/9fa6d13fdbac6c82917c23c9b63b4f3cb7b7593e
> Cr-Commit-Position: refs/heads/master@{#298205}

TBR=perkj@chromium.org,kjellander@chromium.org,phoglund@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=417756
Committed: https://crrev.com/290d2cfa5187ac1f2c87fde4c6dd6f27dad0c93a
Cr-Commit-Position: refs/heads/master@{#298262}

[jam, 2014-10-06 17:21:08]

Created Revert of Re-enabling fixed WebRTC getusermedia tests.

[commit-bot: I haz the power, 2014-10-06 17:22:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/630143002/1

[commit-bot: I haz the power, 2014-10-06 17:24:00]

Committed patchset #1 (id:1) as dca1a27f3d07eea480bcc22b20b0c85b42852502

[commit-bot: I haz the power, 2014-10-06 17:24:46]

Patchset 1 (id:??) landed as
https://crrev.com/290d2cfa5187ac1f2c87fde4c6dd6f27dad0c93a
Cr-Commit-Position: refs/heads/master@{#298262}

[phoglund_chromium, 2014-10-10 08:49:40]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/644873003/ by phoglund@chromium.org.

The reason for reverting is: Should be fixed by
https://codereview.chromium.org/638423002/ and
https://codereview.chromium.org/640253002..