Move PacedSender ownership to RtpTransportControllerSend.

webrtc/call/rtp_transport_controller_send.h

Index: webrtc/call/rtp_transport_controller_send.h
diff --git a/webrtc/call/rtp_transport_controller_send.h b/webrtc/call/rtp_transport_controller_send.h
index 28e0b2d7a7205af86a3729f0487cb3e8d76c89f8..adc4b8892c55d3b939fc77662abc4ae1c198bc3b 100644
--- a/webrtc/call/rtp_transport_controller_send.h
+++ b/webrtc/call/rtp_transport_controller_send.h
@@ -14,6 +14,8 @@
 #include "webrtc/call/rtp_transport_controller_send_interface.h"
 #include "webrtc/common_types.h"
 #include "webrtc/modules/congestion_controller/include/send_side_congestion_controller.h"
+#include "webrtc/modules/pacing/paced_sender.h"
+#include "webrtc/modules/pacing/packet_router.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
@@ -29,6 +31,7 @@ class RtpTransportControllerSend : public RtpTransportControllerSendInterface {
 
   // Implements RtpTransportControllerSendInterface
   PacketRouter* packet_router() override;
+  PacedSender* pacer() override;
   SendSideCongestionController* send_side_cc() override;
   TransportFeedbackObserver* transport_feedback_observer() override;
   RtpPacketSender* packet_sender() override;
@@ -38,6 +41,7 @@ class RtpTransportControllerSend : public RtpTransportControllerSendInterface {
 
  private:
   PacketRouter packet_router_;
+  PacedSender pacer_;
   SendSideCongestionController send_side_cc_;
   RtpKeepAliveConfig keepalive_;