Revert of [Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011 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
@@ skipping 358 matching lines @@
     m_attachmentRoot = nullptr;
 }
 
 void HTMLConstructionSite::setForm(HTMLFormElement* form)
 {
     // This method should only be needed for HTMLTreeBuilder in the fragment case.
     ASSERT(!m_form);
     m_form = form;
 }
 
-HTMLFormElement* HTMLConstructionSite::form() const
-{
-    return m_form.get();
-}
-
 PassRefPtrWillBeRawPtr<HTMLFormElement> HTMLConstructionSite::takeForm()
 {
     return m_form.release();
 }
 
 void HTMLConstructionSite::dispatchDocumentElementAvailableIfNeeded()
 {
     ASSERT(m_document);
     if (m_document->frame() && !m_isParsingFragment)
         m_document->frame()->loader().dispatchDocumentElementAvailable();
@@ skipping 484 matching lines @@
 }
 
 DEFINE_TRACE(HTMLConstructionSite::PendingText)
 {
     visitor->trace(parent);
     visitor->trace(nextChild);
 }
 
 
 }