Add the internals of RtcEvent's subclasses

webrtc/logging/rtc_event_log/events/rtc_event_probe_cluster_created.h

Index: webrtc/logging/rtc_event_log/events/rtc_event_probe_cluster_created.h
diff --git a/webrtc/logging/rtc_event_log/events/rtc_event_probe_cluster_created.h b/webrtc/logging/rtc_event_log/events/rtc_event_probe_cluster_created.h
index cd453b5bb5d422793b3b09d020c5724f2eefacff..29a029064c059a7afdaf768a7f3a161a85f2aeb9 100644
--- a/webrtc/logging/rtc_event_log/events/rtc_event_probe_cluster_created.h
+++ b/webrtc/logging/rtc_event_log/events/rtc_event_probe_cluster_created.h
@@ -17,9 +17,18 @@ namespace webrtc {
 
 class RtcEventProbeClusterCreated final : public RtcEvent {
  public:
+  RtcEventProbeClusterCreated(int id,
+                              int bitrate_bps,
+                              int min_probes,
+                              int min_byte);
   ~RtcEventProbeClusterCreated() override = default;
 
   Type GetType() const override;
+
+  const int id_;
+  const int bitrate_bps_;
+  const int min_probes_;
+  const int min_byte_;
 };
 
 }  // namespace webrtc