Let unresolved custom element go through CustomElementCallbackQueue.

Source/core/dom/custom/CustomElementResolutionStep.cpp

 /*
  * 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 11 matching lines @@
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  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 #include "config.h"
-#include "modules/mediastream/NavigatorUserMediaError.h"
+#include "core/dom/custom/CustomElementResolutionStep.h"
+
+#include "core/dom/Element.h"
+#include "core/dom/custom/CustomElementRegistrationContext.h"
 
 namespace WebCore {
 
-String NavigatorUserMediaError::name() const
+PassOwnPtr<CustomElementResolutionStep> CustomElementResolutionStep::create(const CustomElementDescriptor& descriptor)
 {
-    switch (m_name) {
-    case NamePermissionDenied:
-        return "PermissionDeniedError";
+    return adoptPtr(new CustomElementResolutionStep(descriptor));
+}
 
-    case NameConstraintNotSatisfied:
-        return "ConstraintNotSatisfiedError";
-    }
-
-    ASSERT_NOT_REACHED();
-    return String();
+void CustomElementResolutionStep::dispatch(Element* element)
+{
+    element->document().registrationContext()->resolve(element, m_descriptor);

[dominicc (has gone to gerrit), 2013/12/14 02:42:39]

Looking up the registration context this way will break if this sequence of
things happen:

1. Element is created => resolution scheduled.
2. Something moves element to a new document.
3. Processing queue reaches resolution step for element.

In this case the registration context could be different.

We should record the registration context in the resolution step.

[Hajime Morrita, 2013/12/16 09:00:34]

Done, added a test also.

 }
 
 } // namespace WebCore