Revert of Reenable WebrtcBrowserTest.CanMakeEmptyCallThenAddStreamsAndRenegotiateEnable test again.

Revert of Reenable WebrtcBrowserTest.CanMakeEmptyCallThenAddStreamsAndRenegotiateEnable test again. (patchset #2 of https://codereview.chromium.org/254713004/)

Reason for revert:
Still failing:

http://build.chromium.org/p/chromium.mac/builders/Mac%2010.6%20Tests%20%28dbg%29%281%29/builds/52254/steps/content_browsertests/logs/CanMakeEmptyCallThenAddStreamsAndRenegotiate

Original issue's description:
> Reenable WebrtcBrowserTest.CanMakeEmptyCallThenAddStreamsAndRenegotiateEnable test again.
> The underalying problem is now fixed. See http://crbug/293125 and  https://code.google.com/p/webrtc/source/detail?r=5870
> 
> BUG=293125, 362431
> 
> Committed: https://chromium.googlesource.com/chromium/src/+/b9a00c2caf679dfd2e97a3d6bbfd5e214609e1fc
TBR=perkj
NOTRY=true

Committed: https://crrev.com/147bd4c5f34d80b5ac680db55a3d2d092788a7b9
Cr-Commit-Position: refs/heads/master@{#291671}

[pauljensen, 2014-08-25 12:31:14]

Created Revert of Reenable
WebrtcBrowserTest.CanMakeEmptyCallThenAddStreamsAndRenegotiateEnable test again.

[pauljensen, 2014-08-25 12:32:13]

The CQ bit was checked by pauljensen@chromium.org

[commit-bot: I haz the power, 2014-08-25 12:33:16]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/pauljensen@chromium.org/500963002/1

[commit-bot: I haz the power, 2014-08-25 12:33:47]

Committed patchset #1 (1) as ace0d03a7d599080582712704438086805dcfcd9

[commit-bot: I haz the power, 2014-09-10 02:34:08]

Patchset 1 (id:??) landed as
https://crrev.com/147bd4c5f34d80b5ac680db55a3d2d092788a7b9
Cr-Commit-Position: refs/heads/master@{#291671}