Fixing status of document.register test for dart2js tests

tests/html/custom/document_register_type_extensions_test.dart

Index: tests/html/custom/document_register_type_extensions_test.dart
diff --git a/tests/html/custom/document_register_type_extensions_test.dart b/tests/html/custom/document_register_type_extensions_test.dart
index 385887ffbcd14b45be8ab5d31c07c288d0985a64..5acba993974d642a42a683e20cf0c9c875f3919d 100644
--- a/tests/html/custom/document_register_type_extensions_test.dart
+++ b/tests/html/custom/document_register_type_extensions_test.dart
@@ -72,20 +72,22 @@ main() {
 
   setUp(loadPolyfills);
 
-  group('construction', () {
+  group('registration', () {
     setUp(registerTypes);
 
-    group('registration', () {
-      test('cannot register twice', () {
-        expect(() => document.register(FooBad.tag, Foo), throws);
-      });
+    test('cannot register twice', () {
+      expect(() => document.register(FooBad.tag, Foo), throws);
+    });
 
-      test('cannot register for non-matching tag', () {
-        expect(() {
-          document.register('x-input-div', Bar, extendsTag: 'div');
-        }, throws);
-      });
+    test('cannot register for non-matching tag', () {
+      expect(() {
+        document.register('x-input-div', Bar, extendsTag: 'div');
+      }, throws);
     });
+  });
+
+  group('construction', () {
+    setUp(registerTypes);
 
     group('constructors', () {