Move ownership of RtpTransportControllerSendInterface from Call to PeerConnection.

webrtc/call/fake_rtp_transport_controller_send.h

Index: webrtc/call/fake_rtp_transport_controller_send.h
diff --git a/webrtc/call/fake_rtp_transport_controller_send.h b/webrtc/call/fake_rtp_transport_controller_send.h
index 2456228f5315ba642777b09f9d0c7f1fb3605980..de914099467e60da807d9e5d7ad22001493930be 100644
--- a/webrtc/call/fake_rtp_transport_controller_send.h
+++ b/webrtc/call/fake_rtp_transport_controller_send.h
@@ -17,6 +17,11 @@
 
 namespace webrtc {
 
+// TODO(nisse): This is almost the same as RtpTransportControllerSend,
+// only difference is that it doesn't own the PacketRouter and
+// SendSideCongestionController. However, RtpTransportControllerSend
+// should likely move in that direction too, and then this class
+// becomes redundant.
 class FakeRtpTransportControllerSend
     : public RtpTransportControllerSendInterface {
  public: