Clean up forward declarations in Source/core/html

Source/core/html/HTMLTextAreaElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 12 matching lines @@
 
 #ifndef HTMLTextAreaElement_h
 #define HTMLTextAreaElement_h
 
 #include "core/html/HTMLTextFormControlElement.h"
 
 namespace blink {
 
 class BeforeTextInsertedEvent;
 class ExceptionState;
-class VisibleSelection;
 
 class HTMLTextAreaElement FINAL : public HTMLTextFormControlElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<HTMLTextAreaElement> create(Document&, HTMLFormElement*);
 
     int cols() const { return m_cols; }
     int rows() const { return m_rows; }
 
     bool shouldWrapText() const { return m_wrap != NoWrap; }
@@ skipping 86 matching lines @@
     WrapMethod m_wrap;
     mutable String m_value;
     mutable bool m_isDirty;
     bool m_valueIsUpToDate;
     String m_suggestedValue;
 };
 
 } // namespace blink
 
 #endif // HTMLTextAreaElement_h