Fix virtual/override/final usage in Source/core/svg/.

Source/core/svg/SVGMPathElement.h

 /*
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 19 matching lines @@
 
 class SVGPathElement;
 
 class SVGMPathElement final : public SVGElement,
                               public SVGURIReference {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SVGMPathElement);
 public:
     DECLARE_NODE_FACTORY(SVGMPathElement);
 
-    virtual ~SVGMPathElement();
+    ~SVGMPathElement() override;
 
     SVGPathElement* pathElement();
 
     void targetPathChanged();
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit SVGMPathElement(Document&);
 
-    virtual void buildPendingResource() override;
+    void buildPendingResource() override;
     void clearResourceReferences();
-    virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
-    virtual void removedFrom(ContainerNode*) override;
+    InsertionNotificationRequest insertedInto(ContainerNode*) override;
+    void removedFrom(ContainerNode*) override;
 
-    virtual void svgAttributeChanged(const QualifiedName&) override;
+    void svgAttributeChanged(const QualifiedName&) override;
 
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override { return false; }
+    bool layoutObjectIsNeeded(const ComputedStyle&) override { return false; }
     void notifyParentOfPathChange(ContainerNode*);
 
 };
 
 } // namespace blink
 
 #endif // SVGMPathElement_h