Revert was patchset #8 id:140001 of https://codereview.webrtc.org/1338203003/ The culprit was RTC_DCHECK(poller_thread_->Start()); in rampup_test.cc BUG=webrtc:4173 R=stefan@webrtc.org Review URL: https://codereview.webrtc.org/1362303002 . Cr-Commit-Position: refs/heads/master@{#10052}