Probing: Add support for exponential startup probing

webrtc/modules/remote_bitrate_estimator/transport_feedback_adapter.cc

Index: webrtc/modules/remote_bitrate_estimator/transport_feedback_adapter.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/transport_feedback_adapter.cc b/webrtc/modules/remote_bitrate_estimator/transport_feedback_adapter.cc
index d7067b3ef8eb10eea02c41995ccd48df410cb25a..66ef7f04953524b5fb44531f644c91f48b853e22 100644
--- a/webrtc/modules/remote_bitrate_estimator/transport_feedback_adapter.cc
+++ b/webrtc/modules/remote_bitrate_estimator/transport_feedback_adapter.cc
@@ -39,10 +39,8 @@ class PacketInfoComparator {
 };
 
 TransportFeedbackAdapter::TransportFeedbackAdapter(
-    BitrateController* bitrate_controller,
     Clock* clock)
     : send_time_history_(clock, kSendTimeHistoryWindowMs),
-      bitrate_controller_(bitrate_controller),
       clock_(clock),
       current_offset_ms_(kNoTimestamp),
       last_timestamp_us_(kNoTimestamp) {}
@@ -141,16 +139,6 @@ std::vector<PacketInfo> TransportFeedbackAdapter::GetTransportFeedbackVector()
   return last_packet_feedback_vector_;
 }
 
-void TransportFeedbackAdapter::OnReceiveBitrateChanged(
-    const std::vector<uint32_t>& ssrcs,
-    uint32_t bitrate) {
-  bitrate_controller_->UpdateDelayBasedEstimate(bitrate);
-}
-
-void TransportFeedbackAdapter::OnProbeBitrate(uint32_t bitrate) {
-  bitrate_controller_->UpdateProbeBitrate(bitrate);
-}
-
 void TransportFeedbackAdapter::OnRttUpdate(int64_t avg_rtt_ms,
                                            int64_t max_rtt_ms) {
   RTC_DCHECK(bitrate_estimator_.get() != nullptr);