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

Source/core/svg/SVGFEImageElement.h

Index: Source/core/svg/SVGFEImageElement.h
diff --git a/Source/core/svg/SVGFEImageElement.h b/Source/core/svg/SVGFEImageElement.h
index c9d1ec2c07e05eca180c5475dc31baed0bb1ab78..9bf8f8654708a6d9d36abbfda8f2aa9559cf165c 100644
--- a/Source/core/svg/SVGFEImageElement.h
+++ b/Source/core/svg/SVGFEImageElement.h
@@ -42,7 +42,7 @@ public:
 
     bool currentFrameHasSingleSecurityOrigin() const;
 
-    virtual ~SVGFEImageElement();
+    ~SVGFEImageElement() override;
     SVGAnimatedPreserveAspectRatio* preserveAspectRatio() { return m_preserveAspectRatio.get(); }
 
     // Promptly remove as a ImageResource client.
@@ -52,17 +52,17 @@ public:
 private:
     explicit SVGFEImageElement(Document&);
 
-    virtual void svgAttributeChanged(const QualifiedName&) override;
-    virtual void notifyFinished(Resource*) override;
+    void svgAttributeChanged(const QualifiedName&) override;
+    void notifyFinished(Resource*) override;
 
-    virtual PassRefPtrWillBeRawPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) override;
+    PassRefPtrWillBeRawPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) override;
 
     void clearResourceReferences();
     void fetchImageResource();
 
-    virtual void buildPendingResource() override;
-    virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
-    virtual void removedFrom(ContainerNode*) override;
+    void buildPendingResource() override;
+    InsertionNotificationRequest insertedInto(ContainerNode*) override;
+    void removedFrom(ContainerNode*) override;
 
     RefPtrWillBeMember<SVGAnimatedPreserveAspectRatio> m_preserveAspectRatio;