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

Source/core/dom/DOMURL.h

Index: Source/core/dom/DOMURL.h
diff --git a/Source/core/dom/DOMURL.h b/Source/core/dom/DOMURL.h
index 9313dc1818cce27afcf84d31ad4dab856f5cac66..17dc127c45c78b494a26b2bf21003647af12f80c 100644
--- a/Source/core/dom/DOMURL.h
+++ b/Source/core/dom/DOMURL.h
@@ -64,11 +64,11 @@ public:
     CORE_EXPORT static String createPublicURL(ExecutionContext*, URLRegistrable*, const String& uuid = String());
     static void revokeObjectUUID(ExecutionContext*, const String&);
 
-    virtual KURL url() const override { return m_url; }
-    virtual void setURL(const KURL& url) override { m_url = url; }
+    KURL url() const override { return m_url; }
+    void setURL(const KURL& url) override { m_url = url; }
 
-    virtual String input() const override { return m_input; }
-    virtual void setInput(const String&) override;
+    String input() const override { return m_input; }
+    void setInput(const String&) override;
 
     DEFINE_INLINE_TRACE() { }