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

Source/core/svg/SVGStopElement.h

Index: Source/core/svg/SVGStopElement.h
diff --git a/Source/core/svg/SVGStopElement.h b/Source/core/svg/SVGStopElement.h
index 55d600858332d9dc87074840f71d2d32e1d9aa06..0fcaee7a0f5aa0785f524a81b812ccb89341daf8 100644
--- a/Source/core/svg/SVGStopElement.h
+++ b/Source/core/svg/SVGStopElement.h
@@ -42,10 +42,10 @@ public:
 private:
     explicit SVGStopElement(Document&);
 
-    virtual void svgAttributeChanged(const QualifiedName&) override;
+    void svgAttributeChanged(const QualifiedName&) override;
 
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    bool layoutObjectIsNeeded(const ComputedStyle&) override;
 
     RefPtrWillBeMember<SVGAnimatedNumber> m_offset;
 };