Oilpan: Remove support for tracing off-heap HashSets.

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 5775 matching lines @@
             if (!visitor->isAlive(it->key))
                 deadNodes.append(it->key);
         }
         for (unsigned i = 0; i < deadNodes.size(); ++i)
             didClearTouchEventHandlers(deadNodes[i]);
     }
 }
 
 void Document::trace(Visitor* visitor)
 {
+#if ENABLE(OILPAN)
     visitor->trace(m_importsController);
     visitor->trace(m_docType);
     visitor->trace(m_implementation);
     visitor->trace(m_autofocusElement);
     visitor->trace(m_focusedElement);
     visitor->trace(m_hoverNode);
     visitor->trace(m_activeHoverElement);
     visitor->trace(m_documentElement);
     visitor->trace(m_titleElement);
     visitor->trace(m_markers);
     visitor->trace(m_cssTarget);
     visitor->trace(m_currentScriptStack);
     visitor->trace(m_scriptRunner);
     visitor->trace(m_transformSourceDocument);
     visitor->trace(m_listsInvalidatedAtDocument);
-#if ENABLE(OILPAN)
     for (int i = 0; i < numNodeListInvalidationTypes; ++i)
         visitor->trace(m_nodeLists[i]);
-#endif
     visitor->trace(m_cssCanvasElements);
     visitor->trace(m_topLayerElements);
     visitor->trace(m_elemSheet);
     visitor->trace(m_nodeIterators);
     visitor->trace(m_ranges);
     visitor->trace(m_styleEngine);
     visitor->trace(m_formController);
     visitor->trace(m_domWindow);
     visitor->trace(m_fetcher);
     visitor->trace(m_parser);
     visitor->trace(m_contextFeatures);
     visitor->trace(m_styleSheetList);
     visitor->trace(m_mediaQueryMatcher);
     visitor->trace(m_scriptedAnimationController);
     visitor->trace(m_registrationContext);
     visitor->trace(m_customElementMicrotaskRunQueue);
     visitor->trace(m_elementDataCache);
     visitor->trace(m_associatedFormControls);
     visitor->trace(m_useElementsNeedingUpdate);
     visitor->trace(m_layerUpdateSVGFilterElements);
     visitor->trace(m_templateDocument);
     visitor->trace(m_templateDocumentHost);
     visitor->trace(m_visibilityObservers);
     visitor->trace(m_userActionElements);
     visitor->trace(m_svgExtensions);
     visitor->trace(m_timeline);
     visitor->trace(m_compositorPendingAnimations);
     visitor->trace(m_contextDocument);
     visitor->registerWeakMembers<Document, &Document::clearWeakMembers>(this);
+#endif
     DocumentSupplementable::trace(visitor);
     TreeScope::trace(visitor);
     ContainerNode::trace(visitor);
     ExecutionContext::trace(visitor);
 }
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 using namespace WebCore;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (WeakDocumentSet::const_iterator it = set.begin(); it != set.end(); ++it) {
         fprintf(stderr, "- Document %p URL: %s\n", *it, (*it)->url().string().utf8().data());
     }
 }
 #endif