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

Source/core/html/HTMLBRElement.h

Index: Source/core/html/HTMLBRElement.h
diff --git a/Source/core/html/HTMLBRElement.h b/Source/core/html/HTMLBRElement.h
index a0ceeab2d24acb9cebcc053f9f4d6ca63cadd550..9dcb9bcbad9cd4d23aaed50fecdc308ca25f6095 100644
--- a/Source/core/html/HTMLBRElement.h
+++ b/Source/core/html/HTMLBRElement.h
@@ -34,15 +34,15 @@ class CORE_EXPORT HTMLBRElement final : public HTMLElement {
 public:
     DECLARE_NODE_FACTORY(HTMLBRElement);
 
-    virtual bool canContainRangeEndPoint() const override { return false; }
+    bool canContainRangeEndPoint() const override { return false; }
 
 private:
     explicit HTMLBRElement(Document&);
 
-    virtual bool isPresentationAttribute(const QualifiedName&) const override;
-    virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override;
+    bool isPresentationAttribute(const QualifiedName&) const override;
+    void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override;
 
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
 };
 
 } // namespace blink