Paint backgrounds of a table section/row in one display item

third_party/WebKit/Source/core/paint/TableRowPainter.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 TableRowPainter_h
 #define TableRowPainter_h
 
 #include "core/style/ShadowData.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
+class CellSpan;
 class LayoutPoint;
 class LayoutTableCell;
 class LayoutTableRow;
 struct PaintInfo;
 
 class TableRowPainter {
   STACK_ALLOCATED();
 
  public:
   TableRowPainter(const LayoutTableRow& layoutTableRow)
       : m_layoutTableRow(layoutTableRow) {}
 
   void paint(const PaintInfo&, const LayoutPoint&);
   void paintOutline(const PaintInfo&, const LayoutPoint&);
-  void paintBoxShadow(const PaintInfo&, const LayoutPoint&, ShadowStyle);
+  void paintBoxDecorationBackground(const PaintInfo&,
+                                    const LayoutPoint&,
+                                    const CellSpan& dirtiedColumns);
+
+ private:
   void paintBackgroundBehindCell(const LayoutTableCell&,
                                  const PaintInfo&,
                                  const LayoutPoint&);
 
- private:
   const LayoutTableRow& m_layoutTableRow;
 };
 
 }  // namespace blink
 
 #endif  // TableRowPainter_h