Process Custom Elements in post-order.

Source/core/dom/CustomElement.h

 /*
  * Copyright (C) 2013 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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CustomElement_h
 #define CustomElement_h
 
 #include "core/dom/CustomElementDefinition.h"
 #include "wtf/HashMap.h"
+#include "wtf/HashSet.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 #include "wtf/text/AtomicString.h"
 
 namespace WebCore {
 
 class Document;
 class Element;
 
 class CustomElement {
 public:
     // FIXME: CustomElementRegistry requires isValidTypeName to be a
     // superset of isCustomTagName; consider either merging these or
     // separating them completely into
     // isCustomTagName/isTypeExtensionName.
     static bool isValidTypeName(const AtomicString& type);
     static bool isCustomTagName(const AtomicString& localName);
     static void allowTagName(const AtomicString& localName);
 
     // API for registration contexts
+    static void setBeingParsed(Element*);
     static void define(Element*, PassRefPtr<CustomElementDefinition>);
 
     // API for wrapper creation, which uses a definition as a key
     static CustomElementDefinition* definitionFor(Element*);
 
     // API for Element to kick off changes
 
+    static void finishedParsingChildren(Element*);
     static void attributeDidChange(Element*, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue);
     static void didEnterDocument(Element*, Document*);
     static void didLeaveDocument(Element*, Document*);
     static void wasDestroyed(Element*);
 
 private:
     CustomElement();
 
     static Vector<AtomicString>& allowedCustomTagNames();
 
     // Maps resolved elements to their definitions
 
     class DefinitionMap {
         WTF_MAKE_NONCOPYABLE(DefinitionMap);
     public:
         DefinitionMap() { }
         ~DefinitionMap() { }
 
         void add(Element*, PassRefPtr<CustomElementDefinition>);
         void remove(Element*);
         CustomElementDefinition* get(Element*);
 
     private:
         typedef HashMap<Element*, RefPtr<CustomElementDefinition> > ElementDefinitionHashMap;
         ElementDefinitionHashMap m_definitions;
     };
     static DefinitionMap& definitions();
+
+    typedef HashSet<Element*> ElementSet;
+    static ElementSet& elementsBeingParsed();
+    static void setFinishedParsing(Element*);
 };
 
 }
 
 #endif // CustomElement_h