Retire ThreadState::registerPreFinalizer<T>()

third_party/WebKit/Source/modules/peerconnection/RTCDTMFSender.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 58 matching lines @@
 RTCDTMFSender::RTCDTMFSender(ExecutionContext* context,
                              MediaStreamTrack* track,
                              std::unique_ptr<WebRTCDTMFSenderHandler> handler)
     : SuspendableObject(context),
       m_track(track),
       m_duration(defaultToneDurationMs),
       m_interToneGap(defaultInterToneGapMs),
       m_handler(std::move(handler)),
       m_stopped(false),
       m_scheduledEventTimer(this, &RTCDTMFSender::scheduledEventTimerFired) {
-  ThreadState::current()->registerPreFinalizer(this);
   m_handler->setClient(this);
 }
 
 RTCDTMFSender::~RTCDTMFSender() {}
 
 void RTCDTMFSender::dispose() {
   // Promptly clears a raw reference from content/ to an on-heap object
   // so that content/ doesn't access it in a lazy sweeping phase.
   m_handler->setClient(nullptr);
   m_handler.reset();
@@ skipping 95 matching lines @@
 }
 
 DEFINE_TRACE(RTCDTMFSender) {
   visitor->trace(m_track);
   visitor->trace(m_scheduledEvents);
   EventTargetWithInlineData::trace(visitor);
   SuspendableObject::trace(visitor);
 }
 
 }  // namespace blink