content::RTCRtpSenders/Receivers using track adapter references.

third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.h

Index: third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.h
diff --git a/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.h b/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.h
index 765b7e478b7d899c8bab5b3981751157a56755bf..2ef95610926c9f8293a2354e796e301900ab3d91 100644
--- a/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.h
+++ b/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.h
@@ -231,12 +231,6 @@ class RTCPeerConnection final : public EventTargetWithInlineData,
   void DispatchScheduledEvent();
   MediaStreamTrack* GetLocalTrackById(const String& track_id) const;
   MediaStreamTrack* GetRemoteTrackById(const String& track_id) const;
-  // Senders and receivers returned by the handler are in use by the peer
-  // connection, a sender or receiver that is no longer in use is permanently
-  // inactive and does not need to be referenced anymore. These methods removes
-  // such senders/receivers from |rtp_senders_|/|rtp_receivers_|.
-  void RemoveInactiveSenders();
-  void RemoveInactiveReceivers();
 
   void ChangeSignalingState(WebRTCPeerConnectionHandlerClient::SignalingState);
   void ChangeIceGatheringState(
@@ -263,8 +257,8 @@ class RTCPeerConnection final : public EventTargetWithInlineData,
   // relevant events. https://crbug.com/705901
   MediaStreamVector local_streams_;
   MediaStreamVector remote_streams_;
-  HeapHashMap<uintptr_t, Member<RTCRtpSender>> rtp_senders_;
-  HeapHashMap<uintptr_t, Member<RTCRtpReceiver>> rtp_receivers_;
+  HeapHashMap<uintptr_t, WeakMember<RTCRtpSender>> rtp_senders_;
+  HeapHashMap<uintptr_t, WeakMember<RTCRtpReceiver>> rtp_receivers_;
 
   std::unique_ptr<WebRTCPeerConnectionHandler> peer_handler_;