Replace pinch scrollbars with regular scrollbars.

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index 658e9df69d0958472e573808d1a75d3d7163a007..8af3162fc15eaf7a4fb2629b94060fb802c641f9 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -350,6 +350,7 @@ public:
     IntRect scrollableAreaBoundingBox() const override;
     bool scrollAnimatorEnabled() const override;
     bool usesCompositedScrolling() const override;
+    GraphicsLayer* layerForScrollbarContainer() const override;
     GraphicsLayer* layerForScrolling() const override;
     GraphicsLayer* layerForHorizontalScrollbar() const override;
     GraphicsLayer* layerForVerticalScrollbar() const override;
@@ -698,7 +699,6 @@ private:
     bool adjustScrollbarExistence(ComputeScrollbarExistenceOption = FirstPass);
     void adjustScrollbarOpacity();
     void setScrollOffsetFromUpdateScrollbars(const DoubleSize&);
-    bool visualViewportSuppliesScrollbars() const;
 
     IntRect rectToCopyOnScroll() const;