Start probes only after network is connected.

webrtc/test/direct_transport.cc

Index: webrtc/test/direct_transport.cc
diff --git a/webrtc/test/direct_transport.cc b/webrtc/test/direct_transport.cc
index 18d3ee636269ea7b10a90fa15c2a458e664a57a9..b26aadd0544ea9a9ff802285d4a1eea25e47b05b 100644
--- a/webrtc/test/direct_transport.cc
+++ b/webrtc/test/direct_transport.cc
@@ -28,6 +28,10 @@ DirectTransport::DirectTransport(const FakeNetworkPipe::Config& config,
       shutting_down_(false),
       fake_network_(clock_, config) {
   thread_.Start();
+  if (send_call_) {
+    send_call_->SignalChannelNetworkState(MediaType::AUDIO, kNetworkUp);
+    send_call_->SignalChannelNetworkState(MediaType::VIDEO, kNetworkUp);
+  }
 }
 
 DirectTransport::~DirectTransport() { StopSending(); }