Update Custom Elements API to new names.

Source/bindings/v8/V8HiddenPropertyName.h

 /*
  * Copyright (C) 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 22 matching lines @@
 
 #include <v8.h>
 
 namespace WebCore {
 
 #define V8_HIDDEN_PROPERTIES(V) \
     V(adaptorFunctionPeer) \
     V(attributeListener) \
     V(callback) \
     V(condition) \
+    V(customElementAttached) \
     V(customElementAttributeChanged) \
     V(customElementCreated) \
+    V(customElementDetached) \
     V(customElementDocument) \
-    V(customElementEnteredView) \
     V(customElementIsInterfacePrototypeObject) \
-    V(customElementLeftView) \
     V(customElementNamespaceURI) \
     V(customElementTagName) \
     V(customElementType) \
     V(data) \
     V(detail) \
     V(document) \
     V(event) \
     V(error) \
     V(listener) \
     V(scriptState) \
@@ skipping 15 matching lines @@
 private:
     static void createString(const char* key, v8::Persistent<v8::String>* handle, v8::Isolate*);
 #define V8_DECLARE_FIELD(name) v8::Persistent<v8::String> m_##name;
     V8_HIDDEN_PROPERTIES(V8_DECLARE_FIELD);
 #undef V8_DECLARE_FIELD
 };
 
 }
 
 #endif // V8HiddenPropertyName_h