CongestionController::SetBweBitrates may now trigger probing.

webrtc/modules/pacing/paced_sender.cc

Index: webrtc/modules/pacing/paced_sender.cc
diff --git a/webrtc/modules/pacing/paced_sender.cc b/webrtc/modules/pacing/paced_sender.cc
index bb071f16561e6f4ddffcd4926e44c0e8feb5d42f..b0b86ee40e73cce3af346a12876613484059cce4 100644
--- a/webrtc/modules/pacing/paced_sender.cc
+++ b/webrtc/modules/pacing/paced_sender.cc
@@ -261,12 +261,15 @@ PacedSender::PacedSender(Clock* clock, PacketSender* packet_sender)
       packets_(new paced_sender::PacketQueue(clock)),
       packet_counter_(0) {
   UpdateBytesPerInterval(kMinPacketLimitMs);
-  prober_->ProbeAtBitrate(900000, 6);
-  prober_->ProbeAtBitrate(1800000, 5);
 }
 
 PacedSender::~PacedSender() {}
 
+void PacedSender::CreateProbeCluster(int bitrate_bps, int num_packets) {
+  CriticalSectionScoped cs(critsect_.get());
+  prober_->CreateProbeCluster(bitrate_bps, num_packets);
+}
+
 void PacedSender::Pause() {
   LOG(LS_INFO) << "PacedSender paused.";
   CriticalSectionScoped cs(critsect_.get());