Do not re-register cached id-name HTMLCollection at same invalidation type

third_party/WebKit/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 3706 matching lines @@
     if (m_cssTarget)
         m_cssTarget->pseudoStateChanged(CSSSelector::PseudoTarget);
     m_cssTarget = newTarget;
     if (m_cssTarget)
         m_cssTarget->pseudoStateChanged(CSSSelector::PseudoTarget);
 }
 
 void Document::registerNodeList(const LiveNodeListBase* list)
 {
 #if ENABLE(OILPAN)
+    ASSERT(!m_nodeLists[list->invalidationType()].contains(list));
     m_nodeLists[list->invalidationType()].add(list);
 #else
     m_nodeListCounts[list->invalidationType()]++;
 #endif
     if (list->isRootedAtTreeScope())
         m_listsInvalidatedAtDocument.add(list);
 }
 
 void Document::unregisterNodeList(const LiveNodeListBase* list)
 {
@@ skipping 2197 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     Document::WeakDocumentSet& set = Document::liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif