Add the internals of RtcEvent's subclasses

webrtc/logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.cc

 /*
  *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #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;
 }
 
 bool RtcEventRtpPacketOutgoing::IsConfigEvent() const {
   return false;
 }
 
 }  // namespace webrtc