Remove unused includes from various .cpp files in core/

Source/core/editing/SpellChecker.cpp

 /*
  * 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 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. 
  */
 
 #include "config.h"
 #include "core/editing/SpellChecker.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/DocumentMarkerController.h"
 #include "core/dom/Node.h"
-#include "core/dom/PositionIterator.h"
 #include "core/dom/Range.h"
 #include "core/editing/Editor.h"
-#include "core/editing/TextCheckingHelper.h"
-#include "core/editing/TextIterator.h"
-#include "core/editing/htmlediting.h"
-#include "core/html/HTMLInputElement.h"
-#include "core/html/HTMLTextAreaElement.h"
 #include "core/page/EditorClient.h"
 #include "core/page/Frame.h"
 #include "core/page/Page.h"
 #include "core/page/Settings.h"
 #include "core/platform/text/TextCheckerClient.h"
-#include "core/rendering/RenderObject.h"
 
 namespace WebCore {
 
 SpellCheckRequest::SpellCheckRequest(
         PassRefPtr<Range> checkingRange,
         PassRefPtr<Range> paragraphRange,
         const String& text,
         TextCheckingTypeMask mask,
         TextCheckingProcessType processType,
         const Vector<uint32_t>& documentMarkersInRange,
@@ skipping 204 matching lines @@
     didCheck(sequence, results);
 }
 
 void SpellChecker::didCheckCancel(int sequence)
 {
     Vector<TextCheckingResult> results;
     didCheck(sequence, results);
 }
 
 } // namespace WebCore