Remove a bunch of frame-level scrolling machinery.

sky/engine/platform/scroll/ScrollableArea.cpp

 /*
  * Copyright (c) 2010, Google Inc. All rights reserved.
  * Copyright (C) 2008, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 256 matching lines @@
 
 void ScrollableArea::willEndLiveResize()
 {
     if (!m_inLiveResize)
         return;
     m_inLiveResize = false;
     if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
         scrollAnimator->willEndLiveResize();
 }
 
-void ScrollableArea::contentAreaWillPaint() const
-{
-    if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
-        scrollAnimator->contentAreaWillPaint();
-}
-
 void ScrollableArea::mouseEnteredContentArea() const
 {
     if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
         scrollAnimator->mouseEnteredContentArea();
 }
 
 void ScrollableArea::mouseExitedContentArea() const
 {
     if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
         scrollAnimator->mouseEnteredContentArea();
@@ skipping 188 matching lines @@
 {
     return scrollSize(orientation);
 }
 
 float ScrollableArea::pixelStep(ScrollbarOrientation) const
 {
     return 1;
 }
 
 } // namespace blink