List marker pseudo elements.

Source/core/dom/PseudoElement.h

 /*
  * 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 49 matching lines @@
 };
 
 const QualifiedName& pseudoElementTagName();
 
 inline bool pseudoElementRendererIsNeeded(const ComputedStyle* style)
 {
     if (!style)
         return false;
     if (style->display() == NONE)
         return false;
+
+    if (style->styleType() == MARKER)
+        return style->listStyleType() != NoneListStyle;
+
     if (style->styleType() == FIRST_LETTER || style->styleType() == BACKDROP)
         return true;
     return style->contentData();
 }
 
 DEFINE_ELEMENT_TYPE_CASTS(PseudoElement, isPseudoElement());
 
 } // namespace
 
 #endif