Use table as display item client for painting composited collapsed table cell borders.

third_party/WebKit/Source/core/paint/TableCellPainter.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TableCellPainter_h
 #define TableCellPainter_h
 
 #include "core/style/CollapsedBorderValue.h"
 #include "platform/graphics/paint/DisplayItem.h"
 #include "wtf/Allocator.h"
@@ skipping 22 matching lines @@
                              const CollapsedBorderValue&);
   void paintContainerBackgroundBehindCell(const PaintInfo&,
                                           const LayoutPoint&,
                                           const LayoutObject& backgroundObject,
                                           DisplayItem::Type);
   void paintBoxDecorationBackground(const PaintInfo&,
                                     const LayoutPoint& paintOffset);
   void paintMask(const PaintInfo&, const LayoutPoint& paintOffset);
 
  private:
+  const DisplayItemClient& displayItemClientForBorders() const;
   LayoutRect paintRectNotIncludingVisualOverflow(
       const LayoutPoint& paintOffset);
   void paintBackground(const PaintInfo&,
                        const LayoutRect&,
                        const LayoutObject& backgroundObject);
 
   const LayoutTableCell& m_layoutTableCell;
 };
 
 }  // namespace blink
 
 #endif  // TableCellPainter_h