Let unresolved custom element go through CustomElementCallbackQueue.

LayoutTests/fast/dom/custom/document-register-on-create-callback-expected.txt

Index: LayoutTests/fast/dom/custom/document-register-on-create-callback-expected.txt
diff --git a/LayoutTests/fast/css/min-max-width-expected.txt b/LayoutTests/fast/dom/custom/document-register-on-create-callback-expected.txt
similarity index 50%
copy from LayoutTests/fast/css/min-max-width-expected.txt
copy to LayoutTests/fast/dom/custom/document-register-on-create-callback-expected.txt
index daf99100a858c3e23c8fbbd5308baa38ca777eca..03aff89b8801603ec3ce2197a313b3ec6d16eb0e 100644
--- a/LayoutTests/fast/css/min-max-width-expected.txt
+++ b/LayoutTests/fast/dom/custom/document-register-on-create-callback-expected.txt
@@ -1,12 +1,10 @@
-Tests offsetWidth using min-width and max-width
+document.register() in a createdCallback should upgrade elements that are in the same processing queue.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS testWidth("max-width:150px") is 100
-PASS testWidth("max-width:50px") is 50
-PASS testWidth("min-width:150px") is 150
-PASS testWidth("min-width:50px") is 100
+PASS createdElements is ['elemA0', 'elemB0']
+PASS createdElements is ['elemA0', 'elemB0', 'elemB1']
 PASS successfullyParsed is true
 
 TEST COMPLETE