Animations: Port ProgrammaticScrollAnimator to use compositor timelines

Source/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 469 matching lines @@
 bool ScrollableArea::hasLayerForVerticalScrollbar() const
 {
     return layerForVerticalScrollbar();
 }
 
 bool ScrollableArea::hasLayerForScrollCorner() const
 {
     return layerForScrollCorner();
 }
 
-void ScrollableArea::layerForScrollingDidChange()
+void ScrollableArea::layerForScrollingDidChange(WebCompositorAnimationTimeline* timeline)
 {
     if (ProgrammaticScrollAnimator* programmaticScrollAnimator = existingProgrammaticScrollAnimator())
-        programmaticScrollAnimator->layerForCompositedScrollingDidChange();
+        programmaticScrollAnimator->layerForCompositedScrollingDidChange(timeline);
 }
 
 bool ScrollableArea::scheduleAnimation()
 {
     if (HostWindow* window = hostWindow()) {
         window->scheduleAnimation();
         return true;
     }
     return false;
 }
@@ skipping 106 matching lines @@
         verticalScrollbarWidth = !verticalBar->isOverlayScrollbar() ? verticalBar->width() : 0;
     if (Scrollbar* horizontalBar = horizontalScrollbar())
         horizontalScrollbarHeight = !horizontalBar->isOverlayScrollbar() ? horizontalBar->height() : 0;
 
     return IntSize(std::max(0, size.width() - verticalScrollbarWidth),
         std::max(0, size.height() - horizontalScrollbarHeight));
 
 }
 
 } // namespace blink