Revert of Replace pinch scrollbars with regular scrollbars.

Source/core/paint/DeprecatedPaintLayerScrollableArea.cpp

Index: Source/core/paint/DeprecatedPaintLayerScrollableArea.cpp
diff --git a/Source/core/paint/DeprecatedPaintLayerScrollableArea.cpp b/Source/core/paint/DeprecatedPaintLayerScrollableArea.cpp
index a290b96661cc35457981b9d584b6d8ca889dd39f..63f56eff5de1c566f985714effbe658a72e07934 100644
--- a/Source/core/paint/DeprecatedPaintLayerScrollableArea.cpp
+++ b/Source/core/paint/DeprecatedPaintLayerScrollableArea.cpp
@@ -49,7 +49,6 @@
 #include "core/dom/Node.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/FrameSelection.h"
-#include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ -171,13 +170,6 @@
     return nullptr;
 }
 
-GraphicsLayer* DeprecatedPaintLayerScrollableArea::layerForScrollbarContainer() const
-{
-    if (layer()->isRootLayer())
-        return box().frame()->host()->visualViewport().layerForScrollbarContainer();
-    return layerForContainer();
-}
-
 GraphicsLayer* DeprecatedPaintLayerScrollableArea::layerForScrolling() const
 {
     return layer()->hasCompositedDeprecatedPaintLayerMapping() ? layer()->compositedDeprecatedPaintLayerMapping()->scrollingContentsLayer() : 0;