Remove Platform.upgrateCustomElements.

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 9d6b56046dd4c90606d479341dc76e93a9a609fd..bbb6bb8931ad3b5b13f7dac893a1721cfc9dbe96 100644
--- a/tests/html/custom_elements_test.dart
+++ b/tests/html/custom_elements_test.dart
@@ -5,6 +5,7 @@
 library custom_elements_test;
 import 'dart:async';
 import 'dart:html';
+import 'dart:js' as js;
 import 'package:unittest/html_individual_config.dart';
 import 'package:unittest/unittest.dart';
 import 'utils.dart';
@@ -118,7 +119,7 @@ main() {
       });
 
       document.register(tag, CustomType);
-      Platform.upgradeCustomElements(dom);
+      customElementsTakeRecords();
 
       var postElement = dom.children[0];
       expect(postElement, isNotNull);
@@ -148,7 +149,7 @@ main() {
       var element = new DivElement();
       element.setInnerHtml('<$tag></$tag>',
           treeSanitizer: new NullTreeSanitizer());
-	  Platform.upgradeCustomElements(element);
+      customElementsTakeRecords();
       document.body.nodes.add(element);
       var queried = query(tag);
 
@@ -163,7 +164,7 @@ main() {
       var element = new DivElement();
       element.setInnerHtml('<$tag id="someid"></$tag>',
           treeSanitizer: new NullTreeSanitizer());
-	  Platform.upgradeCustomElements(element);
+      customElementsTakeRecords();
       document.body.nodes.add(element);
       var queried = query('#someid');
 
@@ -181,7 +182,7 @@ main() {
       var element = new DivElement();
       element.setInnerHtml('<$tag></$tag>',
           treeSanitizer: new NullTreeSanitizer());
-      Platform.upgradeCustomElements(element);
+      customElementsTakeRecords();
       document.body.nodes.add(element);
       expect(customCreatedCount, oldCount + 1);
     });