deadbeef d7850b299b Use fake audio device in peerconnectioninterface_unittest.cc.
This test doesn't actually send/receive any audio; it's only testing
the interface layer. But the fact that it was creating/destroying real
audio devices repeatedly caused problems when tests were run in
parallel. So switching to a fake audio device solves this.

BUG=webrtc:7806

Review-Url: https://codereview.webrtc.org/2997383002
Cr-Commit-Position: refs/heads/master@{#19472}
2017-08-23 17:59:19 +00:00
..
2016-04-26 12:28:18 +00:00