When there are no more stylesheets schedule the recalc async

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1263 matching lines @@
 #endif
 }
 
 void Element::createRendererIfNeeded()
 {
     NodeRenderingContext(this).createRendererForElementIfNeeded();
 }
 
 void Element::attach()
 {
+    // We update the style in the document if needed so that our parent style
+    // is always up to date before creating our renderer otherwise our style
+    // can inherit the wrong values. If we end up updating the style we'll
+    // also get attached.
+    document()->updateStyleIfNeeded();

[eseidel, 2013/05/12 09:24:58]

This only occurs for Elements, since they're the only nodes which cary style? 
Do RenderText's not have style?

+    if (attached())
+        return;
+
     PostAttachCallbackDisabler callbackDisabler(this);
     StyleResolverParentPusher parentPusher(this);
     WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
 
     createRendererIfNeeded();
 
     if (parentElement() && parentElement()->isInCanvasSubtree())
         setIsInCanvasSubtree(true);
 
     createPseudoElementIfNeeded(BEFORE);
@@ skipping 1847 matching lines @@
     return 0;
 }
 
 Attribute* UniqueElementData::attributeItem(unsigned index)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(index < length());
     return &m_attributeVector.at(index);
 }
 
 } // namespace WebCore