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

Source/core/dom/ScriptableDocumentParser.h

Index: Source/core/dom/ScriptableDocumentParser.h
diff --git a/Source/core/dom/ScriptableDocumentParser.h b/Source/core/dom/ScriptableDocumentParser.h
index 9754f00820140eac1c4a694425cea5d610c89fa7..35c5f1585afa5bcb1e52edad7bf686c3aa8f9216 100644
--- a/Source/core/dom/ScriptableDocumentParser.h
+++ b/Source/core/dom/ScriptableDocumentParser.h
@@ -58,7 +58,7 @@ protected:
     explicit ScriptableDocumentParser(Document&, ParserContentPolicy = AllowScriptingContent);
 
 private:
-    virtual ScriptableDocumentParser* asScriptableDocumentParser() override final { return this; }
+    ScriptableDocumentParser* asScriptableDocumentParser() final { return this; }
 
     // http://www.whatwg.org/specs/web-apps/current-work/#script-created-parser
     bool m_wasCreatedByScript;