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

Source/modules/accessibility/AXScrollbar.h

 /*
  * Copyright (C) 2010 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 21 matching lines @@
 #include "modules/accessibility/AXMockObject.h"
 
 namespace blink {
 
 class AXObjectCacheImpl;
 class Scrollbar;
 
 class AXScrollbar final : public AXMockObject {
 public:
     static PassRefPtrWillBeRawPtr<AXScrollbar> create(Scrollbar*, AXObjectCacheImpl&);
-    virtual ~AXScrollbar();
+    ~AXScrollbar() override;
     DECLARE_VIRTUAL_TRACE();
 
     Scrollbar* scrollbar() const { return m_scrollbar.get(); }
 
 private:
     AXScrollbar(Scrollbar*, AXObjectCacheImpl&);
 
-    virtual void detachFromParent() override;
+    void detachFromParent() override;
 
-    virtual bool canSetValueAttribute() const override { return true; }
+    bool canSetValueAttribute() const override { return true; }
 
-    virtual bool isAXScrollbar() const override { return true; }
-    virtual LayoutRect elementRect() const override;
+    bool isAXScrollbar() const override { return true; }
+    LayoutRect elementRect() const override;
 
-    virtual AccessibilityRole roleValue() const override { return ScrollBarRole; }
-    virtual AccessibilityOrientation orientation() const override;
-    virtual Document* document() const override;
+    AccessibilityRole roleValue() const override { return ScrollBarRole; }
+    AccessibilityOrientation orientation() const override;
+    Document* document() const override;
 
-    virtual bool isEnabled() const override;
+    bool isEnabled() const override;
 
     // Assumes float [0..1]
-    virtual void setValue(float) override;
-    virtual float valueForRange() const override;
+    void setValue(float) override;
+    float valueForRange() const override;
 
     RefPtrWillBeMember<Scrollbar> m_scrollbar;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXScrollbar, isAXScrollbar());
 
 } // namespace blink
 
 #endif // AXScrollbar_h