Switch AutoscrollController to use animation system instead of timer

Source/core/page/FocusController.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * 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 247 matching lines @@
 }
 
 void FocusController::setFocused(bool focused)
 {
     if (isFocused() == focused)
         return;
 
     m_isFocused = focused;
 
     if (!m_isFocused)
-        focusedOrMainFrame()->eventHandler().stopAutoscrollTimer();
+        focusedOrMainFrame()->eventHandler().stopAutoscroll();
 
     if (!m_focusedFrame)
         setFocusedFrame(m_page->mainFrame());
 
     if (m_focusedFrame->view()) {
         m_focusedFrame->selection().setFocused(focused);
         dispatchEventsOnWindowAndFocusedNode(m_focusedFrame->document(), focused);
     }
 }
 
@@ skipping 620 matching lines @@
         startingRect = nodeRectInAbsoluteCoordinates(container, true /* ignore border */);
         container = scrollableEnclosingBoxOrParentFrameForNodeInDirection(direction, container);
         if (container && container->isDocumentNode())
             toDocument(container)->updateLayoutIgnorePendingStylesheets();
     } while (!consumed && container);
 
     return consumed;
 }
 
 } // namespace WebCore