Fix cause of flakiness and enable CreditCardTests.

chrome/test/data/webui/settings/settings_autofill_section_browsertest.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** @fileoverview Runs the Polymer Autofill Settings tests. */
 
 /** @const {string} Path to root from chrome/test/data/webui/settings/. */
 var ROOT_PATH = '../../../../../';
 
 // Polymer BrowserTest fixture.
@@ skipping 152 matching lines @@
    */
   createCreditCardDialog_: function(creditCardItem) {
     var section = document.createElement('settings-credit-card-edit-dialog');
     section.creditCard = creditCardItem;
     document.body.appendChild(section);
     Polymer.dom.flush();
     return section;
   },
 };
 
-// Disabled because of flakiness http://crbug.com/694289
-TEST_F('SettingsAutofillSectionBrowserTest',
-       'DISABLED_CreditCardTests',
-       function() {
+TEST_F('SettingsAutofillSectionBrowserTest', 'CreditCardTests', function() {
   var self = this;
 
   setup(function() {
     PolymerTest.clearBody();
   });
 
   suite('AutofillSection', function() {
     test('verifyCreditCardCount', function() {
       var section = self.createAutofillSection_([], []);
       assertTrue(!!section);
@@ skipping 70 matching lines @@
 
     test('verifyAddVsEditCreditCardTitle', function() {
       var newCreditCard = FakeDataMaker.emptyCreditCardEntry();
       var newCreditCardDialog = self.createCreditCardDialog_(newCreditCard);
       var oldCreditCard = FakeDataMaker.creditCardEntry();
       var oldCreditCardDialog = self.createCreditCardDialog_(oldCreditCard);
 
       assertNotEquals(oldCreditCardDialog.title_, newCreditCardDialog.title_);
       assertNotEquals('', newCreditCardDialog.title_);
       assertNotEquals('', oldCreditCardDialog.title_);
+
+      // Wait for dialogs to open before finishing test.
+      return Promise.all([
+        test_util.whenAttributeIs(newCreditCardDialog.$.dialog, 'open', true),
+        test_util.whenAttributeIs(oldCreditCardDialog.$.dialog, 'open', true),
+      ]);
     });
 
     test('verifyExpiredCreditCardYear', function() {
       var creditCard = FakeDataMaker.creditCardEntry();
 
       // 2015 is over unless time goes wobbly.
       var twentyFifteen = 2015;
       creditCard.expirationYear = twentyFifteen.toString();
 
       var creditCardDialog = self.createCreditCardDialog_(creditCard);
@@ skipping 639 matching lines @@
           assertEquals(city, cols[0].value);
           assertEquals(state, cols[1].value);
           assertEquals(zip, cols[2].value);
         });
       });
     });
   });
 
   mocha.run();
 });