When there are no more stylesheets schedule the recalc async

Source/core/dom/Document.h

 /*
  * 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, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 1149 matching lines @@
     Timer<Document> m_styleResolverThrowawayTimer;
     double m_lastStyleResolverAccessTime;
 
     OwnPtr<StyleResolver> m_styleResolver;
     bool m_didCalculateStyleResolver;
     bool m_hasNodesWithPlaceholderStyle;
     bool m_needsNotifyRemoveAllPendingStylesheet;
     // But sometimes you need to ignore pending stylesheet count to
     // force an immediate layout when requested by JS.
     bool m_ignorePendingStylesheets;
+    bool m_evaluateMediaQueriesOnStyleRecalc;
 
     // If we do ignore the pending stylesheet count, then we need to add a boolean
     // to track that this happened so that we can do a full repaint when the stylesheets
     // do eventually load.
     PendingSheetLayout m_pendingSheetLayout;
 
     Frame* m_frame;
     DOMWindow* m_domWindow;
     HTMLImport* m_import;
 
@@ skipping 265 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == documentInternal();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h