Remove ~1750 superfluous includes from core

Source/core/html/HTMLOutputElement.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (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/html/HTMLOutputElement.h"
 
 #include "HTMLNames.h"
 #include "core/dom/ExceptionCodePlaceholder.h"
-#include "core/html/HTMLFormElement.h"
 
 namespace WebCore {
 
 inline HTMLOutputElement::HTMLOutputElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
     : HTMLFormControlElement(tagName, document, form)
     , m_isDefaultValueMode(true)
     , m_isSetTextContentInProgress(false)
     , m_defaultValue("")
     , m_tokens(DOMSettableTokenList::create())
 {
@@ skipping 89 matching lines @@
 }
 
 void HTMLOutputElement::setTextContentInternal(const String& value)
 {
     ASSERT(!m_isSetTextContentInProgress);
     m_isSetTextContentInProgress = true;
     setTextContent(value, IGNORE_EXCEPTION);
 }
 
 } // namespace