Start probes only after network is connected.

webrtc/call/call.cc

Index: webrtc/call/call.cc
diff --git a/webrtc/call/call.cc b/webrtc/call/call.cc
index baa89366c78e11b617d30c04f97736f72aabef3b..d2bc153d32765f13d89d1a239b5a17c5e7c15c88 100644
--- a/webrtc/call/call.cc
+++ b/webrtc/call/call.cc
@@ -252,8 +252,8 @@ Call::Call(const Call::Config& config)
       call_stats_(new CallStats(clock_)),
       bitrate_allocator_(new BitrateAllocator(this)),
       config_(config),
-      audio_network_state_(kNetworkUp),
-      video_network_state_(kNetworkUp),
+      audio_network_state_(kNetworkDown),
+      video_network_state_(kNetworkDown),
       receive_crit_(RWLockWrapper::CreateRWLock()),
       send_crit_(RWLockWrapper::CreateRWLock()),
       event_log_(config.event_log),
@@ -284,6 +284,7 @@ Call::Call(const Call::Config& config)
   Trace::CreateTrace();
   call_stats_->RegisterStatsObserver(congestion_controller_.get());
 
+  congestion_controller_->SignalNetworkState(kNetworkDown);
   congestion_controller_->SetBweBitrates(
       config_.bitrate_config.min_bitrate_bps,
       config_.bitrate_config.start_bitrate_bps,