Update editing classes to use OVERRIDE / FINAL when needed

Source/core/editing/markup.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009, 2010, 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Igalia S.L.
  * Copyright (C) 2011 Motorola Mobility. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 112 matching lines @@
     void wrapWithStyleNode(StylePropertySet*, Document*, bool isBlock = false);
     String takeResults();
 
 private:
     void appendStyleNodeOpenTag(StringBuilder&, StylePropertySet*, Document*, bool isBlock = false);
     const String& styleNodeCloseTag(bool isBlock = false);
     virtual void appendText(StringBuilder& out, Text*) OVERRIDE;
     String renderedText(const Node*, const Range*);
     String stringValueForRange(const Node*, const Range*);
     void appendElement(StringBuilder& out, Element*, bool addDisplayInline, RangeFullySelectsNode);
-    void appendElement(StringBuilder& out, Element* element, Namespaces*) OVERRIDE { appendElement(out, element, false, DoesFullySelectNode); }
+    virtual void appendElement(StringBuilder& out, Element* element, Namespaces*) OVERRIDE { appendElement(out, element, false, DoesFullySelectNode); }
 
     enum NodeTraversalMode { EmitString, DoNotEmitString };
     Node* traverseNodesForSerialization(Node* startNode, Node* pastEnd, NodeTraversalMode);
 
     bool shouldAnnotate() { return m_shouldAnnotate == AnnotateForInterchange; }
     bool shouldApplyWrappingStyle(Node* node) const
     {
         return m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode() == node->parentNode()
             && m_wrappingStyle && m_wrappingStyle->style();
     }
@@ skipping 933 matching lines @@
         return;
 
     RefPtr<Text> textNode = toText(node.get());
     RefPtr<Text> textNext = toText(next);
     textNode->appendData(textNext->data());
     if (textNext->parentNode()) // Might have been removed by mutation event.
         textNext->remove(exceptionState);
 }
 
 }