Implement computedRole and computedName (behind a flag)

Source/modules/accessibility/AXTableCell.h

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 15 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AXTableCell_h
 #define AXTableCell_h
 
 #include "modules/accessibility/AXRenderObject.h"
 
 namespace blink {
 
+class AXObjectCache;
+
 class AXTableCell : public AXRenderObject {
 
 protected:
-    explicit AXTableCell(RenderObject*);
+    AXTableCell(RenderObject*, AXObjectCache*);
 public:
-    static PassRefPtr<AXTableCell> create(RenderObject*);
+    static PassRefPtr<AXTableCell> create(RenderObject*, AXObjectCache*);
     virtual ~AXTableCell();
 
     virtual bool isTableCell() const override final;
 
     // fills in the start location and row span of cell
     virtual void rowIndexRange(pair<unsigned, unsigned>& rowRange);
     // fills in the start location and column span of cell
     virtual void columnIndexRange(pair<unsigned, unsigned>& columnRange);
 
 protected:
     virtual AXObject* parentTable() const;
     int m_rowIndex;
     virtual AccessibilityRole determineAccessibilityRole() override final;
 
 private:
     // If a table cell is not exposed as a table cell, a TH element can serve as its title UI element.
     virtual AXObject* titleUIElement() const override final;
     virtual bool exposesTitleUIElement() const override final { return true; }
     virtual bool computeAccessibilityIsIgnored() const override final;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXTableCell, isTableCell());
 
 } // namespace blink
 
 #endif // AXTableCell_h