[css-display] Support display: contents pseudo-elements.

third_party/WebKit/Source/core/dom/PseudoElement.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 79 matching lines @@
   parent->treeScope().adoptIfNeeded(*this);
   setParentOrShadowHostNode(parent);
   setHasCustomStyleCallbacks();
   if ((pseudoId == PseudoIdBefore || pseudoId == PseudoIdAfter) &&
       parent->hasTagName(HTMLNames::inputTag))
     UseCounter::count(parent->document(),
                       UseCounter::PseudoBeforeAfterForInputElement);
 }
 
 PassRefPtr<ComputedStyle> PseudoElement::customStyleForLayoutObject() {
-  return parentOrShadowHostElement()->layoutObject()->getCachedPseudoStyle(
-      m_pseudoId);
+  return parentOrShadowHostElement()->getCachedPseudoStyleOrCache(m_pseudoId);
 }
 
 void PseudoElement::dispose() {
   DCHECK(parentOrShadowHostElement());
 
   InspectorInstrumentation::pseudoElementDestroyed(this);
 
   DCHECK(!nextSibling());
   DCHECK(!previousSibling());
 
@@ skipping 77 matching lines @@
   LayoutObject* ancestor = layoutObject()->parent();
   while (ancestor->isAnonymous() ||
          (ancestor->node() && ancestor->node()->isPseudoElement())) {
     DCHECK(ancestor->parent());
     ancestor = ancestor->parent();
   }
   return ancestor->node();
 }
 
 }  // namespace blink