Remove ScrollableArea and Scrollbar

sky/engine/core/rendering/RenderLayer.h

Index: sky/engine/core/rendering/RenderLayer.h
diff --git a/sky/engine/core/rendering/RenderLayer.h b/sky/engine/core/rendering/RenderLayer.h
index c549b2926559f897c6e64c670960658dee8709b3..bcb14400d128c9de820768273d3e0c7bb1a323ef 100644
--- a/sky/engine/core/rendering/RenderLayer.h
+++ b/sky/engine/core/rendering/RenderLayer.h
@@ -157,7 +157,6 @@ public:
     void paint(GraphicsContext*, const LayoutRect& damageRect, RenderObject* paintingRoot = 0);
     bool hitTest(const HitTestRequest&, HitTestResult&);
     bool hitTest(const HitTestRequest&, const HitTestLocation&, HitTestResult&);
-    void paintOverlayScrollbars(GraphicsContext*, const LayoutRect& damageRect, RenderObject* paintingRoot = 0);
 
     // Pass offsetFromRoot if known.
     bool intersectsDamageRect(const LayoutRect& layerBounds, const LayoutRect& damageRect, const RenderLayer* rootLayer, const LayoutPoint* offsetFromRoot = 0) const;
@@ -216,9 +215,6 @@ public:
 
     bool paintsWithTransform() const;
 
-    bool containsDirtyOverlayScrollbars() const { return m_containsDirtyOverlayScrollbars; }
-    void setContainsDirtyOverlayScrollbars(bool dirtyScrollbars) { m_containsDirtyOverlayScrollbars = dirtyScrollbars; }
-
     FilterOperations computeFilterOperations(const RenderStyle*);
     bool paintsWithFilters() const;
     bool requiresFullLayerImageForFilters() const;
@@ -360,7 +356,6 @@ private:
     // TODO(ojan): Get rid of this. These are basically layer-tree-only paint phases.
     enum PaintLayerFlags {
         PaintContent,
-        PaintOverlayScrollbars,
     };
 
     // Bounding box in the coordinates of this layer.
@@ -466,8 +461,6 @@ private:
     // in a preserves3D hierarchy. Hint to do 3D-aware hit testing.
     unsigned m_has3DTransformedDescendant : 1;
 
-    unsigned m_containsDirtyOverlayScrollbars : 1;
-
     unsigned m_hasFilterInfo : 1;
     unsigned m_needsAncestorDependentCompositingInputsUpdate : 1;
     unsigned m_needsDescendantDependentCompositingInputsUpdate : 1;