Remove unnecessary inclusions of LayoutObject-derived headers in core/editing/

third_party/WebKit/Source/core/editing/iterators/TextIteratorTextState.h

 /*
  * Copyright (C) 2004, 2006, 2009 Apple 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 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef TextIteratorTextState_h
 #define TextIteratorTextState_h
 
 #include "core/CoreExport.h"
 #include "core/dom/Range.h"
 #include "core/editing/iterators/ForwardsTextBuffer.h"
-#include "core/layout/LayoutText.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
+class LayoutText;
+
 class CORE_EXPORT TextIteratorTextState {
     STACK_ALLOCATED();
 public:
     explicit TextIteratorTextState(bool emitsOriginalText);
     ~TextIteratorTextState() { }
 
     const String& string() const { return m_text; }
 
     int length() const { return m_textLength; }
     UChar characterAt(unsigned index) const;
@@ skipping 34 matching lines @@
 
     // Used when deciding whether to emit a "positioning" (e.g. newline) before any other content
     bool m_hasEmitted;
     UChar m_lastCharacter;
     bool m_emitsOriginalText;
 };
 
 } // namespace blink
 
 #endif // TextIteratorTextState_h