Reland main thread position sticky implementation.

third_party/WebKit/Source/core/layout/LayoutTableRow.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2009, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 127 matching lines @@
 
     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectTableRow || LayoutBox::isOfType(type); }
 
     void willBeRemovedFromTree() override;
 
     void addChild(LayoutObject* child, LayoutObject* beforeChild = nullptr) override;
     void layout() override;
 
     PaintLayerType layerTypeRequired() const override
     {
-        if (hasTransformRelatedProperty() || hasHiddenBackface() || hasClipPath() || createsGroup() || style()->shouldCompositeForCurrentAnimations() || style()->hasCompositorProxy())
+        if (hasTransformRelatedProperty() || hasHiddenBackface() || hasClipPath() || createsGroup() || style()->shouldCompositeForCurrentAnimations() || isStickyPositioned() || style()->hasCompositorProxy())
             return NormalPaintLayer;
 
         if (hasOverflowClip())
             return OverflowClipPaintLayer;
 
         return NoPaintLayer;
     }
 
     void paint(const PaintInfo&, const LayoutPoint&) const override;
 
@@ skipping 32 matching lines @@
 
 inline LayoutTableRow* LayoutTableSection::lastRow() const
 {
     ASSERT(children() == virtualChildren());
     return toLayoutTableRow(children()->lastChild());
 }
 
 } // namespace blink
 
 #endif // LayoutTableRow_h