Add the internals of RtcEvent's subclasses

webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.cc

Index: webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.cc
diff --git a/webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.cc b/webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.cc
index c837e7e1ad3645b5c73fa8b17a0f287d42b1762c..582a4bf206dad822190ca25b3e63575acbc53459 100644
--- a/webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.cc
+++ b/webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.cc
@@ -10,8 +10,19 @@
 
 #include "webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.h"
 
+#include "webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h"
+
 namespace webrtc {
 
+RtcEventRtpPacketOutgoing::RtcEventRtpPacketOutgoing(
+    const RtpPacketToSend& packet,
+    int probe_cluster_id)
+    : packet_length_(packet.size()), probe_cluster_id_(probe_cluster_id) {
+  header_.CopyHeaderFrom(packet);
+}
+
+RtcEventRtpPacketOutgoing::~RtcEventRtpPacketOutgoing() = default;
+
 RtcEvent::Type RtcEventRtpPacketOutgoing::GetType() const {
   return RtcEvent::Type::RtpPacketOutgoing;
 }