Refactor background painting behind table cells

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/layout/LayoutTableRow.h"
+#include "core/style/ShadowData.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 class TableRowPainter {
     STACK_ALLOCATED();
 public:
     TableRowPainter(const LayoutTableRow& layoutTableRow) : m_layoutTableRow(layoutTableRow) { }
 
     void paint(const PaintInfo&, const LayoutPoint&);
-    void paintOutlineForRowIfNeeded(const PaintInfo&, const LayoutPoint&);
+    void paintOutline(const PaintInfo&, const LayoutPoint&);
+    void paintBackgroundBehindCell(const LayoutTableCell&, const PaintInfo&, const LayoutPoint&);

[Xianzhu, 2016/05/16 21:47:53]

It calls TableCellPainter::paintContainerBackgroundBehindCell() after setting up
the paint offset in LayoutTableRow's specific way.

I could move this into TableCellPainter
(TableCellPainter::paintRowBackgroundBehindCell()) but it seems better to put it
here because it contains LayoutTableRow-specific code.

 
 private:
     const LayoutTableRow& m_layoutTableRow;
 };
 
 } // namespace blink
 
 #endif // TableRowPainter_h