Custom Element constructors should synchronously invoke the ready callback

Source/core/dom/CustomElementConstructor.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:
  *
  *     * 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 14 matching lines @@
  * 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.
  */
 
 #include "config.h"
 
 #include "core/dom/CustomElementConstructor.h"
 
+#include "core/dom/CustomElementRegistry.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 
 namespace WebCore {
 
 PassRefPtr<CustomElementConstructor> CustomElementConstructor::create(Document* document, const QualifiedName& tag, const AtomicString& typeExtension) {
     return adoptRef(new CustomElementConstructor(document, tag, typeExtension));
 }
 
 CustomElementConstructor::CustomElementConstructor(Document* document, const QualifiedName& tag, const AtomicString& typeExtension)
     : ContextDestructionObserver(document)
     , m_tag(tag)
     , m_typeExtension(typeExtension)
 {
 }
 
 Document* CustomElementConstructor::document() const {
     return toDocument(m_scriptExecutionContext);
 }
 
 PassRefPtr<Element> CustomElementConstructor::createElement(ExceptionCode& ec) {
     if (!document())
         return 0;
-    return document()->createElementNS(m_tag.namespaceURI(), m_tag.localName(), m_typeExtension, ec);
+    RefPtr<Element> result;
+    {
+        CustomElementRegistry::CallbackDeliveryScope deliveryScope;
+        result = document()->createElementNS(m_tag.namespaceURI(), m_tag.localName(), m_typeExtension, ec);
+    }
+    return result.release();
 }
 
 }