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

Source/modules/accessibility/AXSVGRoot.h

 /*
  * Copyright (C) 2012 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 AXSVGRoot final : public AXLayoutObject {
 
 protected:
     AXSVGRoot(LayoutObject*, AXObjectCacheImpl&);
 
 public:
     static PassRefPtrWillBeRawPtr<AXSVGRoot> create(LayoutObject*, AXObjectCacheImpl&);
-    virtual ~AXSVGRoot();
+    ~AXSVGRoot() override;
 
     void setParent(AXObject*) override;
 
 private:
-    virtual AXObject* computeParent() const override;
-    virtual bool isAXSVGRoot() const override { return true; }
+    AXObject* computeParent() const override;
+    bool isAXSVGRoot() const override { return true; }
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXSVGRoot, isAXSVGRoot());
 
 } // namespace blink
 
 #endif // AXSVGRoot_h