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

Source/core/html/HTMLBodyElement.h

Index: Source/core/html/HTMLBodyElement.h
diff --git a/Source/core/html/HTMLBodyElement.h b/Source/core/html/HTMLBodyElement.h
index 3709c46a7d78d39a786f7f04de1c0334977f0b87..494aae424401d1409f03a70b5b79b0d583dcb528 100644
--- a/Source/core/html/HTMLBodyElement.h
+++ b/Source/core/html/HTMLBodyElement.h
@@ -36,7 +36,7 @@ class CORE_EXPORT HTMLBodyElement final : public HTMLElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     DECLARE_NODE_FACTORY(HTMLBodyElement);
-    virtual ~HTMLBodyElement();
+    ~HTMLBodyElement() override;
 
     DEFINE_WINDOW_ATTRIBUTE_EVENT_LISTENER(blur);
     DEFINE_WINDOW_ATTRIBUTE_EVENT_LISTENER(error);
@@ -49,18 +49,18 @@ public:
 private:
     explicit HTMLBodyElement(Document&);
 
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual bool isPresentationAttribute(const QualifiedName&) const override;
-    virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    bool isPresentationAttribute(const QualifiedName&) const override;
+    void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override;
 
-    virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
-    virtual void didNotifySubtreeInsertionsToDocument() override;
+    InsertionNotificationRequest insertedInto(ContainerNode*) override;
+    void didNotifySubtreeInsertionsToDocument() override;
 
-    virtual bool isURLAttribute(const Attribute&) const override;
-    virtual bool hasLegalLinkAttribute(const QualifiedName&) const override;
-    virtual const QualifiedName& subResourceAttributeName() const override;
+    bool isURLAttribute(const Attribute&) const override;
+    bool hasLegalLinkAttribute(const QualifiedName&) const override;
+    const QualifiedName& subResourceAttributeName() const override;
 
-    virtual bool supportsFocus() const override;
+    bool supportsFocus() const override;
 };
 
 } // namespace blink