Refactoring: move ownership of RtcEventLog from Call to PeerConnection

webrtc/api/peerconnection.h

Index: webrtc/api/peerconnection.h
diff --git a/webrtc/api/peerconnection.h b/webrtc/api/peerconnection.h
index 3087160e4329aad293f4ce272d7b5b426f5b17ff..f5b0af8c42caa0dd224d8ee111313af8350b5cc9 100644
--- a/webrtc/api/peerconnection.h
+++ b/webrtc/api/peerconnection.h
@@ -29,6 +29,7 @@ namespace webrtc {
 
 class MediaStreamObserver;
 class VideoRtpReceiver;
+class RtcEventLog;
 
 // Populates |session_options| from |rtc_options|, and returns true if options
 // are valid.
@@ -392,6 +393,8 @@ class PeerConnection : public PeerConnectionInterface,
   IceGatheringState ice_gathering_state_;
 
   std::unique_ptr<cricket::PortAllocator> port_allocator_;
+  // The EventLog needs to outlive the media controller.
+  std::unique_ptr<RtcEventLog> event_log_;
   std::unique_ptr<MediaControllerInterface> media_controller_;
 
   // One PeerConnection has only one RTCP CNAME.
@@ -426,7 +429,6 @@ class PeerConnection : public PeerConnectionInterface,
   std::vector<
       rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>>
       receivers_;
-
   std::unique_ptr<WebRtcSession> session_;
   std::unique_ptr<StatsCollector> stats_;
   rtc::scoped_refptr<RTCStatsCollector> stats_collector_;