Perform probing on network route change.

webrtc/modules/congestion_controller/probe_controller.cc

Index: webrtc/modules/congestion_controller/probe_controller.cc
diff --git a/webrtc/modules/congestion_controller/probe_controller.cc b/webrtc/modules/congestion_controller/probe_controller.cc
index e8b3a2a1cb13b58831075ff7c0e0435eeee35f56..654f8b98f42d46d9830ee3f85044d8efed49bc89 100644
--- a/webrtc/modules/congestion_controller/probe_controller.cc
+++ b/webrtc/modules/congestion_controller/probe_controller.cc
@@ -48,18 +48,9 @@ constexpr int kRepeatedProbeMinPercentage = 70;
 }  // namespace
 
 ProbeController::ProbeController(PacedSender* pacer, Clock* clock)
-    : pacer_(pacer),
-      clock_(clock),
-      network_state_(kNetworkUp),
-      state_(State::kInit),
-      min_bitrate_to_probe_further_bps_(kExponentialProbingDisabled),
-      time_last_probing_initiated_ms_(0),
-      estimated_bitrate_bps_(0),
-      start_bitrate_bps_(0),
-      max_bitrate_bps_(0),
-      last_alr_probing_time_(clock_->TimeInMilliseconds()),
-      enable_periodic_alr_probing_(false),
-      mid_call_probing_waiting_for_result_(false) {}
+    : pacer_(pacer), clock_(clock), enable_periodic_alr_probing_(false) {
+  Reset();
+}
 
 void ProbeController::SetBitrates(int64_t min_bitrate_bps,
                                   int64_t start_bitrate_bps,
@@ -186,6 +177,19 @@ void ProbeController::EnablePeriodicAlrProbing(bool enable) {
   enable_periodic_alr_probing_ = enable;
 }
 
+void ProbeController::Reset() {
+  rtc::CritScope cs(&critsect_);
+  network_state_ = kNetworkUp;
+  state_ = State::kInit;
+  min_bitrate_to_probe_further_bps_ = kExponentialProbingDisabled;
+  time_last_probing_initiated_ms_ = 0;
+  estimated_bitrate_bps_ = 0;
+  start_bitrate_bps_ = 0;
+  max_bitrate_bps_ = 0;
+  last_alr_probing_time_ = clock_->TimeInMilliseconds();
+  mid_call_probing_waiting_for_result_ = false;
+}
+
 void ProbeController::Process() {
   rtc::CritScope cs(&critsect_);