Revert of Temporarily adding timers to one WebRTC browsertest. (https://codereview...

Revert of Temporarily adding timers to one WebRTC browsertest. (https://codereview.chromium.org/371013002/)

Reason for revert:
Broke content_browsertests on win7: https://build.chromium.org/p/chromium.webkit/builders/Win7%20(dbg)/builds/14477/steps/content_browsertests/logs/stdio

Original issue's description:
> Temporarily adding timers to one WebRTC browsertest.
>
> Perhaps then we can see where it gets stuck or slowed down on Android
> bots.
>
> BUG=387895
> NOTRY=true
>
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=281518

TBR=tommi@chromium.org,phoglund@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=387895

Review URL: https://codereview.chromium.org/377763002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@281597 0039d316-1c4b-4281-b951-d872f2087c98