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

third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp

 /*
  * Copyright (C) 2011 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 209 matching lines @@
 }
 
 void MHTMLArchive::generateMHTMLFooter(
     const String& boundary,
     SharedBuffer& outputBuffer)
 {
     CString asciiString = String("--" + boundary + "--\r\n").utf8();
     outputBuffer.append(asciiString.data(), asciiString.length());
 }
 
-ArchiveResource* MHTMLArchive::mainResource() const
-{
-    return m_mainResource.get();
-}
-
 #if !ENABLE(OILPAN)
 void MHTMLArchive::clearAllSubframeArchives()
 {
     SubFrameArchives clearedArchives;
     clearAllSubframeArchivesImpl(&clearedArchives);
 }
 
 void MHTMLArchive::clearAllSubframeArchivesImpl(SubFrameArchives* clearedArchives)
 {
     for (SubFrameArchives::iterator it = m_subframeArchives.begin(); it != m_subframeArchives.end(); ++it) {
@@ skipping 22 matching lines @@
 }
 
 DEFINE_TRACE(MHTMLArchive)
 {
     visitor->trace(m_mainResource);
     visitor->trace(m_subresources);
     visitor->trace(m_subframeArchives);
 }
 
 }