[Oilpan] Prepare full definition of classes before using Member

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

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 161 matching lines @@
 Element* DocumentOrderedMap::getElementByLowercasedMapName(const AtomicString& key, const TreeScope* scope) const
 {
     return get<keyMatchesLowercasedMapName>(key, scope);
 }
 
 Element* DocumentOrderedMap::getElementByLabelForAttribute(const AtomicString& key, const TreeScope* scope) const
 {
     return get<keyMatchesLabelForAttribute>(key, scope);
 }
 
+DocumentOrderedMap::MapEntry::MapEntry(Element* firstElement)
+    : element(firstElement)
+    , count(1)
+{
+}
+
 DEFINE_TRACE(DocumentOrderedMap)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_map);
 #endif
 }
 
 DEFINE_TRACE(DocumentOrderedMap::MapEntry)
 {
     visitor->trace(element);
 #if ENABLE(OILPAN)
     visitor->trace(orderedList);
 #endif
 }
 
 } // namespace blink