Move painting code from RenderTableCell to TableCellPainter.

Source/core/rendering/RenderTableCell.h

Index: Source/core/rendering/RenderTableCell.h
diff --git a/Source/core/rendering/RenderTableCell.h b/Source/core/rendering/RenderTableCell.h
index baad6aeaf245ca8a6e4275f22bdb728cf2c8f420..428e2e98f8e251fd57d19c55078f80d5b74862a9 100644
--- a/Source/core/rendering/RenderTableCell.h
+++ b/Source/core/rendering/RenderTableCell.h
@@ -128,9 +128,6 @@ public:
 
     virtual void paint(PaintInfo&, const LayoutPoint&) override;
 
-    void paintCollapsedBorders(PaintInfo&, const LayoutPoint&);
-    void paintBackgroundsBehindCell(PaintInfo&, const LayoutPoint&, RenderObject* backgroundObject);
-
     LayoutUnit cellBaselinePosition() const;
     bool isBaselineAligned() const
     {
@@ -263,11 +260,6 @@ private:
     CollapsedBorderValue collapsedBeforeBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
     CollapsedBorderValue collapsedAfterBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
 
-    CollapsedBorderValue cachedCollapsedLeftBorder(const RenderStyle*) const;
-    CollapsedBorderValue cachedCollapsedRightBorder(const RenderStyle*) const;
-    CollapsedBorderValue cachedCollapsedTopBorder(const RenderStyle*) const;
-    CollapsedBorderValue cachedCollapsedBottomBorder(const RenderStyle*) const;
-
     CollapsedBorderValue computeCollapsedStartBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
     CollapsedBorderValue computeCollapsedEndBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;
     CollapsedBorderValue computeCollapsedBeforeBorder(IncludeBorderColorOrNot = IncludeBorderColor) const;