Remove custom element upgrades.

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 16 matching lines @@
  * (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 SKY_ENGINE_CORE_DOM_CUSTOM_CUSTOMELEMENTREGISTRATIONCONTEXT_H_
 #define SKY_ENGINE_CORE_DOM_CUSTOM_CUSTOMELEMENTREGISTRATIONCONTEXT_H_
 
 #include "sky/engine/core/dom/QualifiedName.h"
 #include "sky/engine/core/dom/custom/CustomElementDescriptor.h"
 #include "sky/engine/core/dom/custom/CustomElementRegistry.h"
-#include "sky/engine/core/dom/custom/CustomElementUpgradeCandidateMap.h"
 #include "sky/engine/platform/heap/Handle.h"
 #include "sky/engine/wtf/HashMap.h"
 #include "sky/engine/wtf/PassOwnPtr.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 #include "sky/engine/wtf/text/AtomicString.h"
 
 namespace blink {
 
 class CustomElementConstructorBuilder;
 class Document;
@@ skipping 16 matching lines @@
 
     void resolve(Element*, const CustomElementDescriptor&);
 
 protected:
     CustomElementRegistrationContext();
 
 private:
     void resolveOrScheduleResolution(Element*);
 
     CustomElementRegistry m_registry;
-
-    // Element creation
-    OwnPtr<CustomElementUpgradeCandidateMap> m_candidates;
 };
 
 }
 
 #endif  // SKY_ENGINE_CORE_DOM_CUSTOM_CUSTOMELEMENTREGISTRATIONCONTEXT_H_