Add periodic compound packet sending to RtcpTransceiver

Bug: webrtc:8239
Change-Id: I1511db63a15e8c5101a933e55e66d3877ff963be
Reviewed-on: https://webrtc-review.googlesource.com/15440
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20480}
diff --git a/modules/rtp_rtcp/source/rtcp_transceiver_impl.h b/modules/rtp_rtcp/source/rtcp_transceiver_impl.h
index decb4fe..2a9e3d3 100644
--- a/modules/rtp_rtcp/source/rtcp_transceiver_impl.h
+++ b/modules/rtp_rtcp/source/rtcp_transceiver_impl.h
@@ -17,6 +17,7 @@
 #include "api/array_view.h"
 #include "modules/rtp_rtcp/source/rtcp_transceiver_config.h"
 #include "rtc_base/constructormagic.h"
+#include "rtc_base/weak_ptr.h"
 
 namespace webrtc {
 //
@@ -32,8 +33,14 @@
   void SendCompoundPacket();
 
  private:
+  void ReschedulePeriodicCompoundPackets(int64_t delay_ms);
+  // Sends RTCP packets.
+  void SendPacket();
+
   const RtcpTransceiverConfig config_;
 
+  rtc::WeakPtrFactory<RtcpTransceiverImpl> ptr_factory_;
+
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(RtcpTransceiverImpl);
 };