Remove a bunch of frame-level scrolling machinery.

sky/engine/core/rendering/RenderLayerScrollableArea.cpp

Index: sky/engine/core/rendering/RenderLayerScrollableArea.cpp
diff --git a/sky/engine/core/rendering/RenderLayerScrollableArea.cpp b/sky/engine/core/rendering/RenderLayerScrollableArea.cpp
index 00ec725c903e10db37cf712f340783d56cbc00e4..e8d0ca694cfe2be660cbb643be6d436717afe5ad 100644
--- a/sky/engine/core/rendering/RenderLayerScrollableArea.cpp
+++ b/sky/engine/core/rendering/RenderLayerScrollableArea.cpp
@@ -442,14 +442,6 @@ IntPoint RenderLayerScrollableArea::lastKnownMousePosition() const
     return box().frame() ? box().frame()->eventHandler().lastKnownMousePosition() : IntPoint();
 }
 
-bool RenderLayerScrollableArea::scrollbarsCanBeActive() const
-{
-    RenderView* view = box().view();
-    if (!view)
-        return false;
-    return view->frameView()->scrollbarsCanBeActive();
-}
-
 IntRect RenderLayerScrollableArea::scrollableAreaBoundingBox() const
 {
     return box().absoluteBoundingBoxRect();