Refactor Timer classes in preparation for landing FrameTimers.

third_party/WebKit/Source/platform/scroll/Scrollbar.cpp

 /*
  * Copyright (C) 2004, 2006, 2008 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 144 matching lines @@
 
 void Scrollbar::paint(GraphicsContext& context, const CullRect& cullRect) const
 {
     if (!cullRect.intersectsCullRect(frameRect()))
         return;
 
     if (!theme().paint(*this, context, cullRect))
         Widget::paint(context, cullRect);
 }
 
-void Scrollbar::autoscrollTimerFired(Timer<Scrollbar>*)
+void Scrollbar::autoscrollTimerFired(TimerBase*)
 {
     autoscrollPressedPart(theme().autoscrollTimerDelay());
 }
 
 bool Scrollbar::thumbWillBeUnderMouse() const
 {
     int thumbPos = theme().trackPosition(*this) + theme().thumbPosition(*this, scrollableAreaTargetPos());
     int thumbLength = theme().thumbLength(*this);
     return pressedPos() >= thumbPos && pressedPos() < thumbPos + thumbLength;
 }
@@ skipping 414 matching lines @@
         invalidParts = AllParts;
     if (invalidParts & ~ThumbPart)
         m_trackNeedsRepaint = true;
     if (invalidParts & ThumbPart)
         m_thumbNeedsRepaint = true;
     if (m_scrollableArea)
         m_scrollableArea->setScrollbarNeedsPaintInvalidation(orientation());
 }
 
 } // namespace blink