Let unresolved custom element go through CustomElementCallbackQueue.

Source/core/dom/custom/CustomElement.cpp

Index: Source/core/dom/custom/CustomElement.cpp
diff --git a/Source/core/dom/custom/CustomElement.cpp b/Source/core/dom/custom/CustomElement.cpp
index eea313cd8340b815bc6c77029916406bfa2c9059..3608a191cea887eb7a85f58107fd1c198a036fd7 100644
--- a/Source/core/dom/custom/CustomElement.cpp
+++ b/Source/core/dom/custom/CustomElement.cpp
@@ -101,7 +101,9 @@ void CustomElement::define(Element* element, PassRefPtr<CustomElementDefinition>
 
     case Element::WaitingForUpgrade:
         definitions().add(element, definition);
-        CustomElementCallbackScheduler::scheduleCreatedCallback(definition->callbacks(), element);
+        if (element->inDocument() && element->document().domWindow())
+            CustomElementCallbackScheduler::scheduleEnteredViewCallback(definition->callbacks(), element);
+        definition->callbacks()->created(element);

[dominicc (has gone to gerrit), 2013/12/20 05:36:35]

This is a neat simplification.

I guess we were pushing those through the upgrade queue for declarative
registration or something which never came!

         break;
     }
 }