[Refactor] Moved scrollbar creation and deletion to ScrollbarManager

third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h

Index: third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h
index 10c6f8b792397cccfd25f0166fb3b00db1f4e138..690667aaac10eced0d547be16005d57f9613bc89 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h
@@ -143,10 +143,6 @@ class CORE_EXPORT PaintLayerScrollableArea final
 
     void DestroyDetachedScrollbars();
 
-   protected:
-    Scrollbar* CreateScrollbar(ScrollbarOrientation) override;
-    void DestroyScrollbar(ScrollbarOrientation) override;
-
     PaintLayerScrollableArea* ScrollableArea();
   };
 
@@ -228,6 +224,8 @@ class CORE_EXPORT PaintLayerScrollableArea final
   bool HasHorizontalScrollbar() const { return HorizontalScrollbar(); }
   bool HasVerticalScrollbar() const { return VerticalScrollbar(); }
 
+  void WillRemoveScrollbar(Scrollbar&, ScrollbarOrientation) override;
+
   Scrollbar* HorizontalScrollbar() const override {
     return scrollbar_manager_.HorizontalScrollbar();
   }
@@ -280,6 +278,7 @@ class CORE_EXPORT PaintLayerScrollableArea final
   int VisibleWidth() const override;
   IntSize ContentsSize() const override;
   void ContentsResized() override;
+  LayoutObject* LayoutObjectForScrollbarStyle() const override;
   bool IsScrollable() const override;
   IntPoint LastKnownMousePosition() const override;
   bool ScrollAnimatorEnabled() const override;