Process Custom Elements in post-order.

Source/core/dom/CustomElementRegistrationContext.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 39 matching lines @@
 class CustomElementRegistrationContext : public RefCounted<CustomElementRegistrationContext> {
 public:
     static PassRefPtr<CustomElementRegistrationContext> create();
 
     ~CustomElementRegistrationContext() { }
 
     // Definitions
     void registerElement(Document*, CustomElementConstructorBuilder*, const AtomicString& type, ExceptionState&);
 
     // Instance creation
-    PassRefPtr<Element> createCustomTagElement(Document*, const QualifiedName&);
+    enum CreationMode {
+        CreatedByParser,
+        NotCreatedByParser
+    };
+
+    PassRefPtr<Element> createCustomTagElement(Document*, const QualifiedName&, CreationMode = NotCreatedByParser);
     static void setIsAttributeAndTypeExtension(Element*, const AtomicString& type);
-    static void setTypeExtension(Element*, const AtomicString& type);
-
-    // Instance lifecycle
-    void customElementWasDestroyed(Element*);
+    static void setTypeExtension(Element*, const AtomicString& type, CreationMode = NotCreatedByParser);
 
 protected:
     CustomElementRegistrationContext() { }
 
     // Instance creation
     void didGiveTypeExtension(Element*, const AtomicString& type);
 
 private:
     void resolve(Element*, const AtomicString& typeExtension);
     void didResolveElement(CustomElementDefinition*, Element*);
     void didCreateUnresolvedElement(const CustomElementDescriptor&, Element*);
 
     CustomElementRegistry m_registry;
 
     // Element creation
     CustomElementUpgradeCandidateMap m_candidates;
 };
 
 }
 
 #endif // CustomElementRegistrationContext_h