Update editing classes to use OVERRIDE / FINAL when needed

Source/core/editing/SpellCheckRequester.h

 /*
  * Copyright (C) 2010 Google Inc. 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
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class Frame;
 class Node;
 class SpellCheckRequester;
 class TextCheckerClient;
 
-class SpellCheckRequest : public TextCheckingRequest {
+class SpellCheckRequest FINAL : public TextCheckingRequest {
 public:
     static PassRefPtr<SpellCheckRequest> create(TextCheckingTypeMask, TextCheckingProcessType, PassRefPtr<Range> checkingRange, PassRefPtr<Range> paragraphRange, int requestNumber = 0);
     virtual ~SpellCheckRequest();
 
     PassRefPtr<Range> checkingRange() const { return m_checkingRange; }
     PassRefPtr<Range> paragraphRange() const { return m_paragraphRange; }
     PassRefPtr<Element> rootEditableElement() const { return m_rootEditableElement; }
 
     void setCheckerAndSequence(SpellCheckRequester*, int sequence);
     void requesterDestroyed();
@@ skipping 58 matching lines @@
 
     Timer<SpellCheckRequester> m_timerToProcessQueuedRequest;
 
     RefPtr<SpellCheckRequest> m_processingRequest;
     RequestQueue m_requestQueue;
 };
 
 } // namespace WebCore
 
 #endif // SpellCheckRequester_h