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

Source/core/dom/DecodedDataDocumentParser.h

Index: Source/core/dom/DecodedDataDocumentParser.h
diff --git a/Source/core/dom/DecodedDataDocumentParser.h b/Source/core/dom/DecodedDataDocumentParser.h
index 5c106f91e1e199fc0046d3ed01c9b852e5f49f2b..34fcae2cfb63ef12338bb328d48e82099b19a50f 100644
--- a/Source/core/dom/DecodedDataDocumentParser.h
+++ b/Source/core/dom/DecodedDataDocumentParser.h
@@ -39,17 +39,17 @@ public:
     virtual bool wellFormed() const { return true; }
 
     // The below functions are used by DocumentWriter (the loader).
-    virtual void appendBytes(const char* bytes, size_t length) override;
-    virtual void flush() override;
-    virtual bool needsDecoder() const override final { return m_needsDecoder; }
-    virtual void setDecoder(PassOwnPtr<TextResourceDecoder>) override;
-    virtual TextResourceDecoder* decoder() override final;
+    void appendBytes(const char* bytes, size_t length) override;
+    void flush() override;
+    bool needsDecoder() const final { return m_needsDecoder; }
+    void setDecoder(PassOwnPtr<TextResourceDecoder>) override;
+    TextResourceDecoder* decoder() final;
 
     PassOwnPtr<TextResourceDecoder> takeDecoder();
 
 protected:
     explicit DecodedDataDocumentParser(Document&);
-    virtual ~DecodedDataDocumentParser();
+    ~DecodedDataDocumentParser() override;
 
 private:
     void updateDocument(String& decodedData);