Replace pinch scrollbars with regular scrollbars.

Source/core/frame/VisualViewport.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #ifndef VisualViewport_h
 #define VisualViewport_h
 
 #include "core/CoreExport.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/GraphicsLayerClient.h"
 #include "platform/scroll/ScrollableArea.h"
-#include "public/platform/WebScrollbar.h"
 #include "public/platform/WebSize.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 class WebLayerTreeView;
-class WebScrollbarLayer;
 }
 
 namespace blink {
 
 class FrameHost;
 class GraphicsContext;
 class GraphicsLayer;
 class GraphicsLayerFactory;
 class IntRect;
 class IntSize;
@@ skipping 134 matching lines @@
     GraphicsLayer* layerForHorizontalScrollbar() const override;
     GraphicsLayer* layerForVerticalScrollbar() const override;
 
 private:
     explicit VisualViewport(FrameHost&);
 
     // GraphicsLayerClient implementation.
     void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& inClip) override;
     String debugName(const GraphicsLayer*) override;
 
-    void setupScrollbar(WebScrollbar::Orientation);
     FloatPoint clampOffsetToBoundaries(const FloatPoint&);
 
     LocalFrame* mainFrame() const;
 
     FrameHost& frameHost() const
     {
         ASSERT(m_frameHost);
         return *m_frameHost;
     }
 
     RawPtrWillBeMember<FrameHost> m_frameHost;
     OwnPtr<GraphicsLayer> m_rootTransformLayer;
     OwnPtr<GraphicsLayer> m_innerViewportContainerLayer;
     OwnPtr<GraphicsLayer> m_overscrollElasticityLayer;
     OwnPtr<GraphicsLayer> m_pageScaleLayer;
     OwnPtr<GraphicsLayer> m_innerViewportScrollLayer;
-    OwnPtr<GraphicsLayer> m_overlayScrollbarHorizontal;
-    OwnPtr<GraphicsLayer> m_overlayScrollbarVertical;
-    OwnPtr<WebScrollbarLayer> m_webOverlayScrollbarHorizontal;
-    OwnPtr<WebScrollbarLayer> m_webOverlayScrollbarVertical;
 
     // Offset of the visual viewport from the main frame's origin, in CSS pixels.
     FloatPoint m_offset;
     float m_scale;
     IntSize m_size;
     float m_topControlsAdjustment;
 };
 
 } // namespace blink
 
 #endif // VisualViewport_h