TODO(wu): https://code.google.com/p/webrtc/issues/detail?id=2380
WebRtcVideoMediaChannelTest.TwoStreamsAddAndRemoveUnsignalledRecv
WebRtcVideoMediaChannelTest.TwoStreamsReUseFirstStream
WebRtcVideoMediaChannelTest.TwoStreamsSendAndFailUnsignalledRecv
WebRtcVideoMediaChannelTest.TwoStreamsSendAndFailUnsignalledRecvInOneToOne
WebRtcVideoMediaChannelTest.TwoStreamsSendAndReceive
WebRtcVideoMediaChannelTest.TwoStreamsSendAndUnsignalledRecv
