Set send side bitrate estimate on successful probing attempt.

webrtc/modules/bitrate_controller/bitrate_controller_impl.h

Index: webrtc/modules/bitrate_controller/bitrate_controller_impl.h
diff --git a/webrtc/modules/bitrate_controller/bitrate_controller_impl.h b/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
index 114e1a678981d8bb640027d6ec57d76d3491a1c1..e5f595d09e7bb798ddf48fac527011f3cba788a8 100644
--- a/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
+++ b/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
@@ -61,6 +61,8 @@ class BitrateControllerImpl : public BitrateController {
                             uint8_t* fraction_loss,
                             int64_t* rtt) override;
 
+  void UpdateProbeBitrate(uint32_t bitrate_bps) override;
+
   int64_t TimeUntilNextProcess() override;
   void Process() override;