Let unresolved custom element go through CustomElementCallbackQueue.

Source/core/dom/custom/CustomElementCallbackScheduler.cpp

Index: Source/core/dom/custom/CustomElementCallbackScheduler.cpp
diff --git a/Source/core/dom/custom/CustomElementCallbackScheduler.cpp b/Source/core/dom/custom/CustomElementCallbackScheduler.cpp
index 2d36478ea86e92a6136e7c272fe8f44fb9d635e8..4d265ef6a1dfa91cd44296dca6c73ca49e86dd61 100644
--- a/Source/core/dom/custom/CustomElementCallbackScheduler.cpp
+++ b/Source/core/dom/custom/CustomElementCallbackScheduler.cpp
@@ -33,7 +33,9 @@
 
 #include "core/dom/Element.h"
 #include "core/dom/custom/CustomElementCallbackDispatcher.h"
+#include "core/dom/custom/CustomElementCallbackInvocation.h"

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

Oops. Thanks.

 #include "core/dom/custom/CustomElementLifecycleCallbacks.h"
+#include "core/dom/custom/CustomElementResolutionStep.h"
 
 namespace WebCore {
 
@@ -73,6 +75,12 @@ void CustomElementCallbackScheduler::scheduleLeftViewCallback(PassRefPtr<CustomE
     queue->append(CustomElementCallbackInvocation::createInvocation(callbacks, CustomElementLifecycleCallbacks::LeftView));
 }
 
+void CustomElementCallbackScheduler::scheduleResolutionStep(const CustomElementDescriptor& descriptor, PassRefPtr<Element> element)
+{
+    CustomElementCallbackQueue* queue = instance().schedule(element);
+    queue->append(CustomElementResolutionStep::create(descriptor));
+}
+
 CustomElementCallbackScheduler& CustomElementCallbackScheduler::instance()
 {
     DEFINE_STATIC_LOCAL(CustomElementCallbackScheduler, instance, ());