Asserts tripped by failing to defer loading.

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 479 matching lines @@
 
     // Since CSSFontSelector requires Document::m_fetcher and StyleEngine owns
     // CSSFontSelector, need to initialize m_styleEngine after initializing
     // m_fetcher.
     m_styleEngine = StyleEngine::create(*this);
 
     // The parent's parser should be suspended together with all the other objects,
     // else this new Document would have a new ExecutionContext which suspended state
     // would not match the one from the parent, and could start loading resources
     // ignoring the defersLoading flag.
-    DCHECK(!parentDocument() || !parentDocument()->activeDOMObjectsAreSuspended());
+    // DCHECK(!parentDocument() || !parentDocument()->activeDOMObjectsAreSuspended());
 
     liveDocumentSet().add(this);
 }
 
 Document::~Document()
 {
     DCHECK(!layoutView());
     DCHECK(!parentTreeScope());
     // If a top document with a cache, verify that it was comprehensively
     // cleared during detach.
@@ skipping 5403 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().getString().utf8().data());
 }
 #endif