Updating custom element's preregister test to follow new contracts.

tests/html/custom_elements_test.dart

Index: tests/html/custom_elements_test.dart
diff --git a/tests/html/custom_elements_test.dart b/tests/html/custom_elements_test.dart
index e64aca365b82dfdd55c49fc60dcd14ff1118a896..8e71e1492c1838d045620a659540e515e5573896 100644
--- a/tests/html/custom_elements_test.dart
+++ b/tests/html/custom_elements_test.dart
@@ -90,7 +90,8 @@ main() {
       var dom = new Element.html('<div><$tag></$tag></div>');
       var preElement = dom.children[0];
       expect(preElement, isNotNull);
-      expect(preElement is UnknownElement, isTrue);
+      expect(preElement is HtmlElement, isTrue);
+      expect(preElement is CustomType, isFalse);
       var firedOnPre = false;
       preElement.onFocus.listen((_) {
         firedOnPre = true;
@@ -104,8 +105,8 @@ main() {
       expect(postElement.onCreatedCalled, isTrue);
 
       // Element from first query remains an UnknownElement.
-      expect(preElement is UnknownElement, isTrue);
-      expect(preElement.parent, isNull);
+      expect(preElement is HtmlElement, isTrue);
+      expect(preElement.parent, dom);
       expect(dom.children.length, 1);
 
       var firedOnPost = false;
@@ -114,7 +115,7 @@ main() {
       });
       // Event handlers should not persist to new element.
       postElement.dispatchEvent(new Event('focus'));
-      expect(firedOnPre, isFalse);
+      expect(firedOnPre, isTrue);

[vsm, 2013/08/16 18:28:51]

This doesn't match the comment on line #116.

[blois, 2013/08/16 19:45:48]

Done.

       expect(firedOnPost, isTrue);
     });
   });