Optimize collapsed border painting

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 19 matching lines @@
     void paintBackgroundsBehindCell(const PaintInfo&, const LayoutPoint&, const LayoutObject* backgroundObject, DisplayItem::Type);
     void paintBoxDecorationBackground(const PaintInfo&, const LayoutPoint& paintOffset);
     void paintMask(const PaintInfo&, const LayoutPoint& paintOffset);
 
     enum PaintBoundOffsetBehavior { AddOffsetFromParent, DoNotAddOffsetFromParent };
     // Returns the bonds of the table cell for painting, offset by paintOffset, and if desired, the offset from the cell
     // to its parent.
     LayoutRect paintBounds(const LayoutPoint& paintOffset, PaintBoundOffsetBehavior);
 
 private:
-    const CollapsedBorderValue& cachedCollapsedLeftBorder(const ComputedStyle&) const;
-    const CollapsedBorderValue& cachedCollapsedRightBorder(const ComputedStyle&) const;
-    const CollapsedBorderValue& cachedCollapsedTopBorder(const ComputedStyle&) const;
-    const CollapsedBorderValue& cachedCollapsedBottomBorder(const ComputedStyle&) const;
-
     const LayoutTableCell& m_layoutTableCell;
 };
 
 } // namespace blink
 
 #endif // TableCellPainter_h