Refactor Timer classes in preparation for landing FrameTimers.

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 143 matching lines @@
 }
 
 void RTCDTMFSender::scheduleDispatchEvent(Event* event)
 {
     m_scheduledEvents.append(event);
 
     if (!m_scheduledEventTimer.isActive())
         m_scheduledEventTimer.startOneShot(0, BLINK_FROM_HERE);
 }
 
-void RTCDTMFSender::scheduledEventTimerFired(Timer<RTCDTMFSender>*)
+void RTCDTMFSender::scheduledEventTimerFired(TimerBase*)
 {
     if (m_stopped)
         return;
 
     HeapVector<Member<Event>> events;
     events.swap(m_scheduledEvents);
 
     HeapVector<Member<Event>>::iterator it = events.begin();
     for (; it != events.end(); ++it)
         dispatchEvent((*it).release());
 }
 
 DEFINE_TRACE(RTCDTMFSender)
 {
     visitor->trace(m_track);
     visitor->trace(m_scheduledEvents);
     EventTargetWithInlineData::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink