Avoid underlining misspellings when typing inside a word

Source/core/editing/SpellChecker.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 65 matching lines @@
 public:
     friend class SpellCheckRequest;
 
     explicit SpellChecker(Frame*);
     ~SpellChecker();
 
     bool isAsynchronousEnabled() const;
     bool isCheckable(Range*) const;
 
     void requestCheckingFor(PassRefPtr<SpellCheckRequest>);
+    void cancelCheck();
 
     int lastRequestSequence() const
     {
         return m_lastRequestSequence;
     }
 
     int lastProcessedSequence() const
     {
         return m_lastProcessedSequence;
     }
@@ skipping 16 matching lines @@
 
     Timer<SpellChecker> m_timerToProcessQueuedRequest;
 
     RefPtr<SpellCheckRequest> m_processingRequest;
     RequestQueue m_requestQueue;
 };
 
 } // namespace WebCore
 
 #endif // SpellChecker_h