Refactor Timer classes in preparation for landing FrameTimers.

third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp

 /*
  * Copyright (C) 2014, 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
@@ skipping 629 matching lines @@
 }
 
 void AXObjectCacheImpl::childrenChanged(AXObject* obj)
 {
     if (!obj)
         return;
 
     obj->childrenChanged();
 }
 
-void AXObjectCacheImpl::notificationPostTimerFired(Timer<AXObjectCacheImpl>*)
+void AXObjectCacheImpl::notificationPostTimerFired(TimerBase*)
 {
     m_notificationPostTimer.stop();
 
     unsigned i = 0, count = m_notificationsToPost.size();
     for (i = 0; i < count; ++i) {
         AXObject* obj = m_notificationsToPost[i].first;
 
         if (!obj->axObjectID())
             continue;
 
@@ skipping 618 matching lines @@
     visitor->trace(m_document);
     visitor->trace(m_nodeObjectMapping);
 
     visitor->trace(m_objects);
     visitor->trace(m_notificationsToPost);
 
     AXObjectCache::trace(visitor);
 }
 
 } // namespace blink