[css-tables] Clean up code that detects significant border changes

third_party/WebKit/Source/core/layout/LayoutTableBoxComponent.h

 // Copyright 2016 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 LayoutTableBoxComponent_h
 #define LayoutTableBoxComponent_h
 
 #include "core/CoreExport.h"
 #include "core/layout/LayoutBox.h"
 
 namespace blink {
 
+class LayoutTable;
+
 // Common super class for LayoutTableCol, LayoutTableSection and LayoutTableRow.
 class CORE_EXPORT LayoutTableBoxComponent : public LayoutBox {
 public:
     bool backgroundChangedSinceLastPaintInvalidation() const { return m_backgroundChangedSinceLastPaintInvalidation; }
     void clearBackgroundChangedSinceLastPaintInvalidation() { m_backgroundChangedSinceLastPaintInvalidation = false; }
-
+    static bool doCellsHaveDirtyWidth(const LayoutObject& tablePart, const LayoutTable&, const StyleDifference&, const ComputedStyle& oldStyle);
 protected:
     explicit LayoutTableBoxComponent(Element* element)
         : LayoutBox(element)
         , m_backgroundChangedSinceLastPaintInvalidation(false)
     {
     }
 
     const LayoutObjectChildList* children() const { return &m_children; }
     LayoutObjectChildList* children() { return &m_children; }
 
@@ skipping 21 matching lines @@
     LayoutObjectChildList* virtualChildren() override { return children(); }
     const LayoutObjectChildList* virtualChildren() const override { return children(); }
 
     LayoutObjectChildList m_children;
     bool m_backgroundChangedSinceLastPaintInvalidation;
 };
 
 } // namespace blink
 
 #endif // LayoutTableBoxComponent_h