Refactor Timer classes in preparation for landing FrameTimers.

third_party/WebKit/Source/modules/encryptedmedia/MediaKeySession.cpp

 /*
  * Copyright (C) 2013 Apple 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 607 matching lines @@
     // 5. Run the following steps asynchronously (documented in
     //    actionTimerFired()).
     m_pendingActions.append(PendingAction::CreatePendingRemove(result));
     if (!m_actionTimer.isActive())
         m_actionTimer.startOneShot(0, BLINK_FROM_HERE);
 
     // 6. Return promise.
     return promise;
 }
 
-void MediaKeySession::actionTimerFired(Timer<MediaKeySession>*)
+void MediaKeySession::actionTimerFired(TimerBase*)
 {
     DCHECK(m_pendingActions.size());
 
     // Resolving promises now run synchronously and may result in additional
     // actions getting added to the queue. As a result, swap the queue to
     // a local copy to avoid problems if this happens.
     HeapDeque<Member<PendingAction>> pendingActions;
     pendingActions.swap(m_pendingActions);
 
     while (!pendingActions.isEmpty()) {
@@ skipping 288 matching lines @@
     visitor->trace(m_asyncEventQueue);
     visitor->trace(m_pendingActions);
     visitor->trace(m_mediaKeys);
     visitor->trace(m_keyStatusesMap);
     visitor->trace(m_closedPromise);
     EventTargetWithInlineData::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink