Start probes only after network is connected.

webrtc/modules/congestion_controller/probe_controller_unittest.cc

Index: webrtc/modules/congestion_controller/probe_controller_unittest.cc
diff --git a/webrtc/modules/congestion_controller/probe_controller_unittest.cc b/webrtc/modules/congestion_controller/probe_controller_unittest.cc
index 98e116644ca714c9c17ceb21f64663246746a143..3842ded5a6909eb61caffdca2cce69a1f4f5d669 100644
--- a/webrtc/modules/congestion_controller/probe_controller_unittest.cc
+++ b/webrtc/modules/congestion_controller/probe_controller_unittest.cc
@@ -51,6 +51,17 @@ TEST_F(ProbeControllerTest, InitiatesProbingAtStart) {
                                  kMaxBitrateBps);
 }
 
+TEST_F(ProbeControllerTest, ProbeOnlyWhenNetworkIsUp) {
+  probe_controller_->OnNetworkStateChanged(kNetworkDown);
+  EXPECT_CALL(pacer_, CreateProbeCluster(_, _)).Times(0);
+  probe_controller_->SetBitrates(kMinBitrateBps, kStartBitrateBps,
+                                 kMaxBitrateBps);
+
+  testing::Mock::VerifyAndClearExpectations(&pacer_);
+  EXPECT_CALL(pacer_, CreateProbeCluster(_, _)).Times(AtLeast(2));
+  probe_controller_->OnNetworkStateChanged(kNetworkUp);
+}
+
 TEST_F(ProbeControllerTest, InitiatesProbingOnMaxBitrateIncrease) {
   EXPECT_CALL(pacer_, CreateProbeCluster(_, _)).Times(AtLeast(2));
   probe_controller_->SetBitrates(kMinBitrateBps, kStartBitrateBps,