Remove embedder custom elements.

sky/engine/core/dom/custom/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 30 matching lines @@
 
 namespace blink {
 
 class CustomElementMicrotaskImportStep;
 class Document;
 class Element;
 class HTMLImportChild;
 
 class CustomElement {
 public:
-    enum NameSet {
-        EmbedderNames = 1 << 0,
-        StandardNames = 1 << 1,
-        AllNames = EmbedderNames | StandardNames
-    };
-    static bool isValidName(const AtomicString& name, NameSet validNames = AllNames);
-    static void addEmbedderCustomElementName(const AtomicString& name);
+    static bool isValidName(const AtomicString& name);
 
     // API to notify of document-level changes
     static CustomElementMicrotaskImportStep* didCreateImport(HTMLImportChild*);
     static void didFinishLoadingImport(Document& master);
 
     // API for registration contexts
     static void define(Element*, PassRefPtr<CustomElementDefinition>);
 
     // API for Element to kick off changes
 
     static void attributeDidChange(Element*, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue);
     static void didAttach(Element*, const Document&);
     static void didDetach(Element*, const Document&);
     static void wasDestroyed(Element*);
 
 private:
     CustomElement();
-
-    static Vector<AtomicString>& embedderCustomElementNames();
 };
 
 }
 
 #endif  // SKY_ENGINE_CORE_DOM_CUSTOM_CUSTOMELEMENT_H_