Update DOM classes to use OVERRIDE / FINAL when needed

Source/core/dom/DocumentFragment.h

Index: Source/core/dom/DocumentFragment.h
diff --git a/Source/core/dom/DocumentFragment.h b/Source/core/dom/DocumentFragment.h
index 4730abcd065a1e46266eafc42628f9240e13bed4..2bf1418b70e2533a72b62482de4d989da2804251 100644
--- a/Source/core/dom/DocumentFragment.h
+++ b/Source/core/dom/DocumentFragment.h
@@ -38,17 +38,17 @@ public:
     void parseHTML(const String&, Element* contextElement, ParserContentPolicy = AllowScriptingContent);
     bool parseXML(const String&, Element* contextElement, ParserContentPolicy = AllowScriptingContent);
 
-    virtual bool canContainRangeEndPoint() const { return true; }
+    virtual bool canContainRangeEndPoint() const OVERRIDE FINAL { return true; }
     virtual bool isTemplateContent() const { return false; }
 
 protected:
     DocumentFragment(Document*, ConstructionType = CreateContainer);
-    virtual String nodeName() const;
+    virtual String nodeName() const OVERRIDE FINAL;
 
 private:
-    virtual NodeType nodeType() const;
-    virtual PassRefPtr<Node> cloneNode(bool deep = true);
-    virtual bool childTypeAllowed(NodeType) const;
+    virtual NodeType nodeType() const OVERRIDE FINAL;
+    virtual PassRefPtr<Node> cloneNode(bool deep = true) OVERRIDE;
+    virtual bool childTypeAllowed(NodeType) const OVERRIDE;
 };
 
 DEFINE_NODE_TYPE_CASTS(DocumentFragment, nodeType() == Node::DOCUMENT_FRAGMENT_NODE);