Add the internals of RtcEvent's subclasses

webrtc/logging/rtc_event_log/events/rtc_event_probe_result_success.h

Index: webrtc/logging/rtc_event_log/events/rtc_event_probe_result_success.h
diff --git a/webrtc/logging/rtc_event_log/events/rtc_event_probe_result_success.h b/webrtc/logging/rtc_event_log/events/rtc_event_probe_result_success.h
index 03848080bf4ef5106cdd59db0265afd4701e4f9d..9a461daf62bd641ebb2ceded66be0da2f540bba4 100644
--- a/webrtc/logging/rtc_event_log/events/rtc_event_probe_result_success.h
+++ b/webrtc/logging/rtc_event_log/events/rtc_event_probe_result_success.h
@@ -17,9 +17,13 @@ namespace webrtc {
 
 class RtcEventProbeResultSuccess final : public RtcEvent {
  public:
+  RtcEventProbeResultSuccess(int id, int bitrate_bps);
   ~RtcEventProbeResultSuccess() override = default;
 
   Type GetType() const override;
+
+  const int id_;
+  const int bitrate_bps_;
 };
 
 }  // namespace webrtc