Remove Platform.upgrateCustomElements.

tests/html/custom/entered_left_view_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library entered_left_view_test;
 
 import 'dart:async';
 import 'dart:html';
 import 'dart:js' as js;
 import 'package:unittest/html_individual_config.dart';
@@ skipping 132 matching lines @@
     test('Left document with a view', () {
       a.remove();
       customElementsTakeRecords();
       expect(invocations, ['left'],
           reason: 'left callback should be invoked when leaving a document '
           'with a view');
     });
 
     test('Created in a document without a view', () {
       docB.body.setInnerHtml('<x-a></x-a>', treeSanitizer: nullSanitizer);
-      Platform.upgradeCustomElements(docB.body);
+      customElementsTakeRecords();
 
       expect(invocations, ['created'],
           reason: 'only created callback should be invoked when parsing a '
           'custom element in a document without a view');
     });
   });
 
   group('shadow_dom', () {
     var div;
     var s;
     setUp(() {
       invocations = [];
       div = new DivElement();
       s = div.createShadowRoot();
     });
 
     tearDown(() {
       customElementsTakeRecords();
     });
 
     test('Created in Shadow DOM that is not in a document', () {
       s.setInnerHtml('<x-a></x-a>', treeSanitizer: nullSanitizer);
-      Platform.upgradeCustomElements(s);
+      customElementsTakeRecords();
 
       expect(invocations, ['created'],
           reason: 'the entered callback should not be invoked when entering a '
           'Shadow DOM subtree not in the document');
     });
 
     test('Leaves Shadow DOM that is not in a document', () {
       s.innerHtml = '';
       expect(invocations, [],
           reason: 'the left callback should not be invoked when leaving a '
           'Shadow DOM subtree not in the document');
     });
 
     test('Enters a document with a view as a constituent of Shadow DOM', () {
       s.setInnerHtml('<x-a></x-a>', treeSanitizer: nullSanitizer);
-      Platform.upgradeCustomElements(s);
+      customElementsTakeRecords();
 
       document.body.append(div);
       customElementsTakeRecords();
       expect(invocations, ['created', 'entered'],
             reason: 'the entered callback should be invoked when inserted into '
             'a document with a view as part of Shadow DOM');
 
       div.remove();
       customElementsTakeRecords();
 
       expect(invocations, ['created', 'entered', 'left'],
           reason: 'the left callback should be invoked when removed from a '
           'document with a view as part of Shadow DOM');
     });
   });
 
 
   group('disconnected_subtree', () {
     var div = new DivElement();
 
     setUp(() {
       invocations = [];
     });
 
     test('Enters a disconnected subtree of DOM', () {
       div.setInnerHtml('<x-a></x-a>', treeSanitizer: nullSanitizer);
-      Platform.upgradeCustomElements(div);
+      customElementsTakeRecords();
 
       expect(invocations, ['created'],
           reason: 'the entered callback should not be invoked when inserted '
           'into a disconnected subtree');
     });
 
     test('Leaves a disconnected subtree of DOM', () {
       div.innerHtml = '';
       expect(invocations, [],
           reason: 'the left callback should not be invoked when removed from a '
           'disconnected subtree');
     });
 
     test('Enters a document with a view as a constituent of a subtree', () {
       div.setInnerHtml('<x-a></x-a>', treeSanitizer: nullSanitizer);
-      Platform.upgradeCustomElements(div);
+      customElementsTakeRecords();
       invocations = [];
       document.body.append(div);
       customElementsTakeRecords();
       expect(invocations, ['entered'],
           reason: 'the entered callback should be invoked when inserted into a '
           'document with a view as part of a subtree');
     });
   });
 }