Fix virtual/override/final usage in Source/modules/.

Source/modules/accessibility/AXARIAGridCell.h

 /*
  * Copyright (C) 2009 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 24 matching lines @@
 
 class AXObjectCacheImpl;
 
 class AXARIAGridCell final : public AXTableCell {
 
 private:
     AXARIAGridCell(LayoutObject*, AXObjectCacheImpl&);
 
 public:
     static PassRefPtrWillBeRawPtr<AXARIAGridCell> create(LayoutObject*, AXObjectCacheImpl&);
-    virtual ~AXARIAGridCell();
+    ~AXARIAGridCell() override;
 
     // fills in the start location and row span of cell
-    virtual void rowIndexRange(pair<unsigned, unsigned>& rowRange) override;
+    void rowIndexRange(pair<unsigned, unsigned>& rowRange) override;
     // fills in the start location and column span of cell
-    virtual void columnIndexRange(pair<unsigned, unsigned>& columnRange) override;
-    virtual AccessibilityRole scanToDecideHeaderRole() override final;
+    void columnIndexRange(pair<unsigned, unsigned>& columnRange) override;
+    AccessibilityRole scanToDecideHeaderRole() final;
 
 protected:
     bool isAriaColumnHeader() const;
     bool isAriaRowHeader() const;
-    virtual AXObject* parentTable() const override;
+    AXObject* parentTable() const override;
 };
 
 } // namespace blink
 
 #endif // AXARIAGridCell_h