Add the internals of RtcEvent's subclasses

webrtc/logging/rtc_event_log/events/rtc_event_rtp_header_outgoing.h

Index: webrtc/logging/rtc_event_log/events/rtc_event_rtp_header_outgoing.h
diff --git a/webrtc/logging/rtc_event_log/events/rtc_event_rtp_header_outgoing.h b/webrtc/logging/rtc_event_log/events/rtc_event_rtp_header_outgoing.h
index c91b83779c6b1ab4fe99ca188406e1d920c9f134..85ed24c0c86d7ca69b5add970188293c221b3246 100644
--- a/webrtc/logging/rtc_event_log/events/rtc_event_rtp_header_outgoing.h
+++ b/webrtc/logging/rtc_event_log/events/rtc_event_rtp_header_outgoing.h
@@ -11,15 +11,22 @@
 #ifndef WEBRTC_LOGGING_RTC_EVENT_LOG_EVENTS_RTC_EVENT_RTP_HEADER_OUTGOING_H_
 #define WEBRTC_LOGGING_RTC_EVENT_LOG_EVENTS_RTC_EVENT_RTP_HEADER_OUTGOING_H_
 
+#include <memory>
+
 #include "webrtc/logging/rtc_event_log/events/rtc_event.h"
 
 namespace webrtc {
 
+class RtpPacketToSend;
+
 class RtcEventRtpHeaderOutgoing final : public RtcEvent {
  public:
-  ~RtcEventRtpHeaderOutgoing() override = default;
+  explicit RtcEventRtpHeaderOutgoing(std::unique_ptr<RtpPacketToSend> packet);
+  ~RtcEventRtpHeaderOutgoing() override;
 
   Type GetType() const override;
+
+  std::unique_ptr<RtpPacketToSend> packet_;
 };
 
 }  // namespace webrtc