Add the internals of RtcEvent's subclasses

webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_incoming.cc

Index: webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_incoming.cc
diff --git a/webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_incoming.cc b/webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_incoming.cc
index 2857a1d91d8eff78c04d3887a87daa4e2202fe05..ce480b800f27b25d509858bc0c15f531afcc8690 100644
--- a/webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_incoming.cc
+++ b/webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_incoming.cc
@@ -10,8 +10,18 @@
 
 #include "webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_incoming.h"
 
+#include "webrtc/modules/rtp_rtcp/source/rtp_packet_received.h"
+
 namespace webrtc {
 
+RtcEventRtpPacketIncoming::RtcEventRtpPacketIncoming(
+    const RtpPacketReceived& packet)
+    : packet_length_(packet.size()) {
+  header_.CopyHeaderFrom(packet);
+}
+
+RtcEventRtpPacketIncoming::~RtcEventRtpPacketIncoming() = default;
+
 RtcEvent::Type RtcEventRtpPacketIncoming::GetType() const {
   return RtcEvent::Type::RtpPacketIncoming;
 }