Mark template class RefCountedObject as final.

ortc/ortcrtpreceiveradapter.cc

 /*
  *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 133 matching lines @@
   if (last_applied_parameters_.encodings[0].ssrc) {
     ssrc = *last_applied_parameters_.encodings[0].ssrc;
   }
   if (internal_receiver_ && ssrc == internal_receiver_->ssrc()) {
     // SSRC not changing; nothing to do.
     return;
   }
   internal_receiver_ = nullptr;
   switch (kind_) {
     case cricket::MEDIA_TYPE_AUDIO:
-      internal_receiver_ =
-          new AudioRtpReceiver(rtc::CreateRandomUuid(), ssrc,
-                               rtp_transport_controller_->voice_channel());
+      internal_receiver_ = new rtc::RefCountedObject<AudioRtpReceiver>(
+          rtc::CreateRandomUuid(), ssrc,
+          rtp_transport_controller_->voice_channel());
       break;
     case cricket::MEDIA_TYPE_VIDEO:
-      internal_receiver_ = new VideoRtpReceiver(
+      internal_receiver_ = new rtc::RefCountedObject<VideoRtpReceiver>(
           rtc::CreateRandomUuid(), rtp_transport_controller_->worker_thread(),
           ssrc, rtp_transport_controller_->video_channel());
       break;
     case cricket::MEDIA_TYPE_DATA:
       RTC_NOTREACHED();
   }
 }
 
 }  // namespace webrtc