Replace pinch scrollbars with regular scrollbars.

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 67a44ea7569a54490a7d2a1c5e0c34ab9663fd29..9f0139ae686925e05f3f50a5dd6385df5c1efd48 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -676,6 +676,13 @@ bool FrameView::usesCompositedScrolling() const
     return false;
 }
 
+GraphicsLayer* FrameView::layerForScrollbarContainer() const
+{
+    if (m_frame->isMainFrame())
+        return page()->frameHost().visualViewport().layerForScrollbarContainer();
+    return layerForContainer();
+}
+
 GraphicsLayer* FrameView::layerForScrolling() const
 {
     LayoutView* layoutView = this->layoutView();