Oilpan: Remove OffHeapCollectionTrait

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 337 matching lines @@
     // Depending on why we're being destroyed it might be OK
     // to forget queued tasks, but currently we don't expect to.
     ASSERT(m_taskQueue.isEmpty());
     // Currently we assume that text will never be the last token in the
     // document and that we'll always queue some additional task to cause it to flush.
     ASSERT(m_pendingText.isEmpty());
 }
 
 DEFINE_TRACE(HTMLConstructionSite)
 {
+#if ENABLE(OILPAN)
     visitor->trace(m_document);
     visitor->trace(m_attachmentRoot);
     visitor->trace(m_head);
     visitor->trace(m_form);
     visitor->trace(m_openElements);
     visitor->trace(m_activeFormattingElements);
     visitor->trace(m_taskQueue);
     visitor->trace(m_pendingText);
+#endif
 }
 
 void HTMLConstructionSite::detach()
 {
     // FIXME: We'd like to ASSERT here that we're canceling and not just discarding
     // text that really should have made it into the DOM earlier, but there
     // doesn't seem to be a nice way to do that.
     m_pendingText.discard();
     m_document = nullptr;
     m_attachmentRoot = nullptr;
@@ skipping 503 matching lines @@
 }
 
 DEFINE_TRACE(HTMLConstructionSite::PendingText)
 {
     visitor->trace(parent);
     visitor->trace(nextChild);
 }
 
 
 }