Notify ProgrammaticScrollAnimator about scroll layer destruction

Source/platform/scroll/ScrollableArea.cpp

Index: Source/platform/scroll/ScrollableArea.cpp
diff --git a/Source/platform/scroll/ScrollableArea.cpp b/Source/platform/scroll/ScrollableArea.cpp
index 55b843007222c8d81d2129d4d8445d25c3536409..367f42821331120cd81245fa9289770ebf7286a2 100644
--- a/Source/platform/scroll/ScrollableArea.cpp
+++ b/Source/platform/scroll/ScrollableArea.cpp
@@ -420,6 +420,12 @@ bool ScrollableArea::hasLayerForScrollCorner() const
     return layerForScrollCorner();
 }
 
+void ScrollableArea::layerForScrollingDidChange()
+{
+    if (ProgrammaticScrollAnimator* programmaticScrollAnimator = existingProgrammaticScrollAnimator())
+        programmaticScrollAnimator->layerForCompositedScrollingDidChange();
+}
+
 bool ScrollableArea::scheduleAnimation()
 {
     if (HostWindow* window = hostWindow()) {