Let unresolved custom element go through CustomElementCallbackQueue.

Source/core/dom/custom/CustomElementCallbackScheduler.h

Index: Source/core/dom/custom/CustomElementCallbackScheduler.h
diff --git a/Source/core/dom/custom/CustomElementCallbackScheduler.h b/Source/core/dom/custom/CustomElementCallbackScheduler.h
index 0311d05662332ee6d59398ba6557952b2ebc8cc2..87607076538e89608554e15389ecd924687ba60d 100644
--- a/Source/core/dom/custom/CustomElementCallbackScheduler.h
+++ b/Source/core/dom/custom/CustomElementCallbackScheduler.h
@@ -39,7 +39,9 @@
 
 namespace WebCore {
 
+class CustomElementDescriptor;
 class CustomElementLifecycleCallbacks;
+class CustomElementRegistrationContext;

[dominicc (has gone to gerrit), 2013/12/18 08:46:41]

Don't think this is needed any more.

[Hajime Morrita, 2013/12/19 05:06:59]

Done.

 class Element;
 
 class CustomElementCallbackScheduler {
@@ -48,6 +50,7 @@ public:
     static void scheduleCreatedCallback(PassRefPtr<CustomElementLifecycleCallbacks>, PassRefPtr<Element>);
     static void scheduleEnteredViewCallback(PassRefPtr<CustomElementLifecycleCallbacks>, PassRefPtr<Element>);
     static void scheduleLeftViewCallback(PassRefPtr<CustomElementLifecycleCallbacks>, PassRefPtr<Element>);
+    static void scheduleResolutionStep(const CustomElementDescriptor&, PassRefPtr<Element>);
 
 protected:
     friend class CustomElementCallbackDispatcher;