[TEST] Do not add Scrollbar as child of FrameView.

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

Index: third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
index 3eda3a9d35244eb7b1a9b8b71c857b8e5156560d..80600923e860daf0362b35e7b62425cc3fac6c05 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
@@ -2000,7 +2000,6 @@ Scrollbar* PaintLayerScrollableArea::ScrollbarManager::CreateScrollbar(
         ScrollableArea(), orientation, scrollbar_size,
         &ScrollableArea()->Box().GetFrame()->GetPage()->GetChromeClient());
   }
-  ScrollableArea()->Box().GetDocument().View()->AddChild(scrollbar);
   return scrollbar;
 }