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

Source/core/html/parser/TextDocumentParser.h

Index: Source/core/html/parser/TextDocumentParser.h
diff --git a/Source/core/html/parser/TextDocumentParser.h b/Source/core/html/parser/TextDocumentParser.h
index 5d9846173669eda216c120a4ed10271e416a808e..5d2886214d1f7a1a7e87e09c119c05a92d5bb147 100644
--- a/Source/core/html/parser/TextDocumentParser.h
+++ b/Source/core/html/parser/TextDocumentParser.h
@@ -36,12 +36,12 @@ public:
     {
         return adoptRefWillBeNoop(new TextDocumentParser(document, syncPolicy));
     }
-    virtual ~TextDocumentParser();
+    ~TextDocumentParser() override;
 
 private:
     explicit TextDocumentParser(HTMLDocument&, ParserSynchronizationPolicy);
 
-    virtual void appendBytes(const char*, size_t) override;
+    void appendBytes(const char*, size_t) override;
     void insertFakePreElement();
 
     bool m_haveInsertedFakePreElement;