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

Source/core/svg/SVGFilterElement.h

Index: Source/core/svg/SVGFilterElement.h
diff --git a/Source/core/svg/SVGFilterElement.h b/Source/core/svg/SVGFilterElement.h
index 597f466d9b8616888a0bca310252213840c7e378..cdbf29534f7847c1a8b7da162f88d74a8f259278 100644
--- a/Source/core/svg/SVGFilterElement.h
+++ b/Source/core/svg/SVGFilterElement.h
@@ -57,14 +57,14 @@ public:
 private:
     explicit SVGFilterElement(Document&);
 
-    virtual bool needsPendingResourceHandling() const override { return false; }
+    bool needsPendingResourceHandling() const override { return false; }
 
-    virtual void svgAttributeChanged(const QualifiedName&) override;
-    virtual void childrenChanged(const ChildrenChange&) override;
+    void svgAttributeChanged(const QualifiedName&) override;
+    void childrenChanged(const ChildrenChange&) override;
 
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
 
-    virtual bool selfHasRelativeLengths() const override;
+    bool selfHasRelativeLengths() const override;
 
     RefPtrWillBeMember<SVGAnimatedLength> m_x;
     RefPtrWillBeMember<SVGAnimatedLength> m_y;