Perform probing on network route change.

webrtc/modules/congestion_controller/transport_feedback_adapter.cc

Index: webrtc/modules/congestion_controller/transport_feedback_adapter.cc
diff --git a/webrtc/modules/congestion_controller/transport_feedback_adapter.cc b/webrtc/modules/congestion_controller/transport_feedback_adapter.cc
index 38f6173e22dbdafe8da051da1c6ad95e8f274720..2d173391f2f1541bf1a48f12f12e3961d7e90621 100644
--- a/webrtc/modules/congestion_controller/transport_feedback_adapter.cc
+++ b/webrtc/modules/congestion_controller/transport_feedback_adapter.cc
@@ -99,6 +99,11 @@ int64_t TransportFeedbackAdapter::GetProbingIntervalMs() const {
   return delay_based_bwe_->GetProbingIntervalMs();
 }
 
+void TransportFeedbackAdapter::ClearSendTimeHistory() {
+  rtc::CritScope cs(&lock_);
+  send_time_history_.Clear();
+}
+
 std::vector<PacketFeedback> TransportFeedbackAdapter::GetPacketFeedbackVector(
     const rtcp::TransportFeedback& feedback) {
   int64_t timestamp_us = feedback.GetBaseTimeUs();