Remove ENTITY_REFERENCE_NODE

Source/core/editing/MarkupAccumulator.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 494 matching lines @@
         appendProcessingInstruction(result, static_cast<const ProcessingInstruction*>(node)->target(), static_cast<const ProcessingInstruction*>(node)->data());
         break;
     case Node::ELEMENT_NODE:
         appendElement(result, toElement(const_cast<Node*>(node)), namespaces);
         break;
     case Node::CDATA_SECTION_NODE:
         appendCDATASection(result, static_cast<const CDATASection*>(node)->data());
         break;
     case Node::ATTRIBUTE_NODE:
     case Node::ENTITY_NODE:
-    case Node::ENTITY_REFERENCE_NODE:
     case Node::NOTATION_NODE:
     case Node::XPATH_NAMESPACE_NODE:
         ASSERT_NOT_REACHED();
         break;
     }
 }
 
 // Rules of self-closure
 // 1. No elements in HTML documents use the self-closing syntax.
 // 2. Elements w/ children never self-close because they use a separate end tag.
@@ skipping 27 matching lines @@
     if (!node->isElementNode() || shouldSelfClose(node) || (!node->hasChildNodes() && elementCannotHaveEndTag(node)))
         return;
 
     result.append('<');
     result.append('/');
     result.append(toElement(node)->nodeNamePreservingCase());
     result.append('>');
 }
 
 }