Remove custom element type extensions.

sky/engine/core/dom/custom/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 43 matching lines @@
     {
         return adoptRef(new CustomElementRegistrationContext());
     }
 
     ~CustomElementRegistrationContext() { }
 
     // Definitions
     void registerElement(Document*, CustomElementConstructorBuilder*, const AtomicString& type, CustomElement::NameSet validNames, ExceptionState&);
 
     PassRefPtr<Element> createCustomTagElement(Document&, const QualifiedName&);
-    static void setIsAttributeAndTypeExtension(Element*, const AtomicString& type);
-    static void setTypeExtension(Element*, const AtomicString& type);
 
     void resolve(Element*, const CustomElementDescriptor&);
 
 protected:
     CustomElementRegistrationContext();
 
-    // Instance creation
-    void didGiveTypeExtension(Element*, const AtomicString& type);
-
 private:
-    void resolveOrScheduleResolution(Element*, const AtomicString& typeExtension);
+    void resolveOrScheduleResolution(Element*);
 
     CustomElementRegistry m_registry;
 
     // Element creation
     OwnPtr<CustomElementUpgradeCandidateMap> m_candidates;
 };
 
 }
 
 #endif  // SKY_ENGINE_CORE_DOM_CUSTOM_CUSTOMELEMENTREGISTRATIONCONTEXT_H_