Refactor Timer classes in preparation for landing FrameTimers.

third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm

 /*
  * Copyright (C) 2010, 2011 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 312 matching lines @@
     {
         m_timer.stop();
     }
 
     void setDuration(CFTimeInterval duration)
     {
         m_duration = duration;
     }
 
 private:
-    void timerFired(Timer<BlinkScrollbarPartAnimationTimer>*)
+    void timerFired(TimerBase*)
     {
         double currentTime = WTF::currentTime();
         double delta = currentTime - m_startTime;
 
         if (delta >= m_duration)
             m_timer.stop();
 
         double fraction = delta / m_duration;
         fraction = clampTo(fraction, 0.0, 1.0);
         double progress = m_timingFunction->evaluate(fraction, 0.001);
@@ skipping 757 matching lines @@
     if (Scrollbar* verticalScrollbar = m_scrollableArea->verticalScrollbar())
         rectInViewCoordinates = verticalScrollbar->convertToContainingWidget(scrollerThumb);
 
     if (rectInViewCoordinates == m_visibleScrollerThumbRect)
         return;
 
     m_visibleScrollerThumbRect = rectInViewCoordinates;
 }
 
 } // namespace blink