[DOM4] Doctypes now always have a node document and can be moved across document boundaries

LayoutTests/fast/dom/DOMImplementation/resources/createDocument-with-used-doctype-frame.html

Index: LayoutTests/fast/dom/DOMImplementation/resources/createDocument-with-used-doctype-frame.html
diff --git a/LayoutTests/fast/dom/DOMImplementation/resources/createDocument-with-used-doctype-frame.html b/LayoutTests/fast/dom/DOMImplementation/resources/createDocument-with-used-doctype-frame.html
index e0e7e6795d7a891fb243760f4207c63517f5c85d..1b21d00406b637c8e2451735b22acc1f952bf186 100644
--- a/LayoutTests/fast/dom/DOMImplementation/resources/createDocument-with-used-doctype-frame.html
+++ b/LayoutTests/fast/dom/DOMImplementation/resources/createDocument-with-used-doctype-frame.html
@@ -6,12 +6,9 @@ FAIL (Script did not run);
 document.body.textContent = "FAIL";
 try {
     document.implementation.createDocument(null, null, document.doctype);
-    document.body.textContent = "FAIL (no exception)";
+    document.body.textContent = "PASS";

[arv (Not doing code reviews), 2013/08/20 14:38:11]

Are we moving (and adopting) the doctype to the new document?

I think this test could be improved a bit.

var doctype = document.doctype;
var doc = document.implementation.createDocument(null, null, document.doctype);
shouldBe('doc.doctype', 'doctype');
shouldBe('doc.firstChild', 'doctype');
shouldBe('document.doctype', 'null');

[do-not-use, 2013/08/20 15:00:38]

Yes, we move an adopt the docType to the new document and Firefox behaves the
same way.

Yes, I actually tried to do that at first but it was a bit annoying because the
main test file was displaying all the results on a single line. Anyway, I will
look into it again.

[do-not-use, 2013/08/20 15:31:00]

Done.

 }
 catch(e) {
-    if (e.code === DOMException.WRONG_DOCUMENT_ERR || e.code === DOMException.NOT_SUPPORTED_ERR)
-        document.body.textContent = "PASS";
-    else
-        document.body.textContent = "FAIL (wrong exception: " + e.code + ")";
+    document.body.textContent = "FAIL threw exception: " + e;
 }
 </script>