Replace most explicit `new RefCountedObject...` with make_ref_counted

Bug: webrtc:12701
Change-Id: Iab91f1e96715eed7f9ddcfe1ca55510a18c817eb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/224544
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35786}
diff --git a/examples/peerconnection/client/main.cc b/examples/peerconnection/client/main.cc
index 3ab4176..04a331d 100644
--- a/examples/peerconnection/client/main.cc
+++ b/examples/peerconnection/client/main.cc
@@ -107,8 +107,7 @@
 
   rtc::InitializeSSL();
   PeerConnectionClient client;
-  rtc::scoped_refptr<Conductor> conductor(
-      new rtc::RefCountedObject<Conductor>(&client, &wnd));
+  auto conductor = rtc::make_ref_counted<Conductor>(&client, &wnd);
 
   // Main loop.
   MSG msg;