Let unresolved custom element go through CustomElementCallbackQueue.

Source/core/dom/custom/CustomElementResolutionStep.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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * 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
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (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 CustomElementException_h
-#define CustomElementException_h
+#ifndef CustomElementResolutionStep_h
+#define CustomElementResolutionStep_h
 
+#include "core/dom/custom/CustomElementDescriptor.h"
+#include "core/dom/custom/CustomElementProcessingStep.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/text/AtomicString.h"
-#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class ExceptionState;
+class CustomElementRegistrationContext;
 
-class CustomElementException {
+class CustomElementResolutionStep : public CustomElementProcessingStep {
+    WTF_MAKE_NONCOPYABLE(CustomElementResolutionStep);
 public:
-    enum Reason {
-        CannotRegisterFromExtension,
-        ConstructorPropertyNotConfigurable,
-        ContextDestroyedCheckingPrototype,
-        ContextDestroyedCreatingCallbacks,
-        ContextDestroyedRegisteringDefinition,
-        ExtendsIsInvalidName,
-        ExtendsIsCustomElementName,
-        InvalidName,
-        PrototypeInUse,
-        PrototypeNotAnObject,
-        TypeAlreadyRegistered
-    };
+    static PassOwnPtr<CustomElementResolutionStep> create(PassRefPtr<CustomElementRegistrationContext>, const CustomElementDescriptor&);
 
-    static void throwException(Reason, const AtomicString& type, ExceptionState&);
+    virtual ~CustomElementResolutionStep();
+
+protected:
+    CustomElementResolutionStep(PassRefPtr<CustomElementRegistrationContext>, const CustomElementDescriptor&);
+
+    virtual void dispatch(Element*) OVERRIDE;
 
 private:
-    CustomElementException();
-
-    static String preamble(const AtomicString& type);
+    RefPtr<CustomElementRegistrationContext> m_context;
+    CustomElementDescriptor m_descriptor;
 };
 
 }
 
-#endif // CustomElementException_h
+#endif // CustomElementResolutionStep_h