1 files changed, 12 insertions, 9 deletions
diff --git a/Source/WebCore/css/CSSUnknownRule.h b/Source/WebCore/css/CSSUnknownRule.h
index a74143a3c..be064530b 100644
--- a/Source/WebCore/css/CSSUnknownRule.h
+++ b/Source/WebCore/css/CSSUnknownRule.h
@@ -19,23 +19,26 @@
  * Boston, MA 02110-1301, USA.
  */
 
-#ifndef CSSUnknownRule_h
-#define CSSUnknownRule_h
+#pragma once
 
 #include "CSSRule.h"
 
 namespace WebCore {
 
-class CSSUnknownRule : public CSSRule {
+class CSSUnknownRule final : public CSSRule {
 public:
-    CSSUnknownRule() : CSSRule(0) { }
+    CSSUnknownRule()
+        : CSSRule(nullptr)
+    {
+    }
+
     virtual ~CSSUnknownRule() { }
 
-    virtual CSSRule::Type type() const override { return UNKNOWN_RULE; }
-    virtual String cssText() const override { return String(); }
-    virtual void reattach(StyleRuleBase*) override { }
+    String cssText() const final { return String(); }
+    void reattach(StyleRuleBase&) final { }
+
+private:
+    CSSRule::Type type() const final { return UNKNOWN_RULE; }
 };
 
 } // namespace WebCore
-
-#endif // CSSUnknownRule_h