Add dialog to edit and save credit cards.

chrome/test/data/webui/settings/passwords_and_autofill_fake_data.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.
 
 /**
  * Used to create fake data for both passwords and autofill.
  * These sections are related, so it made sense to share this.
  */
 function FakeDataMaker() {}
 /**
@@ skipping 49 matching lines @@
   ret.phoneNumbers = [FakeDataMaker.patternMaker_('(xxx) xxx-xxxx', 10)];
   ret.emailAddresses = [FakeDataMaker.patternMaker_('userxxxx@gmail.com', 16)];
   ret.languageCode = 'EN-US';
   ret.metadata = {isLocal: true};
   ret.metadata.summaryLabel = ret.fullNames[0];
   ret.metadata.summarySublabel = ' ' + ret.addressLines;
   return ret;
 };
 
 /**
+ * Creates a new empty credit card entry for testing.
+ * @return {!chrome.autofillPrivate.CreditCardEntry}
+ */
+FakeDataMaker.emptyCreditCardEntry = function() {
+  var now = new Date();
+  var expirationMonth = now.getMonth() + 1;
+  var ret = {};
+  ret.expirationMonth = expirationMonth.toString()
+  ret.expirationYear = now.getFullYear().toString();
+  return ret;
+};
+
+/**
  * Creates a new random credit card entry for testing.
  * @return {!chrome.autofillPrivate.CreditCardEntry}
  */
 FakeDataMaker.creditCardEntry = function() {
   var ret = {};
   ret.guid = FakeDataMaker.makeGuid_();
   ret.name = 'Jane Doe';
   ret.cardNumber = FakeDataMaker.patternMaker_('xxxx xxxx xxxx xxxx', 10);
   ret.expirationMonth = Math.ceil(Math.random() * 11).toString();
   ret.expirationYear = (2016 + Math.floor(Math.random() * 5)).toString();
   ret.metadata = {isLocal: true};
   var cards = ['Visa', 'Mastercard', 'Discover', 'Card'];
   var card = cards[Math.floor(Math.random() * cards.length)];
   ret.metadata.summaryLabel = card + ' ' + '****' + ret.cardNumber.substr(-4);
   return ret;
 };
 
 /**
  * Creates a new random GUID for testing.
- * @return {!string}
+ * @return {string}
  * @private
  */
 FakeDataMaker.makeGuid_ = function() {
   return FakeDataMaker.patternMaker_(
       'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx', 16);
 };
 
 /**
  * Replaces any 'x' in a string with a random number of the base.
- * @param {!string} pattern The pattern that should be used as an input.
- * @param {!number} base The number base. ie: 16 for hex or 10 for decimal.
- * @return {!string}
+ * @param {string} pattern The pattern that should be used as an input.
+ * @param {number} base The number base. ie: 16 for hex or 10 for decimal.
+ * @return {string}
  * @private
  */
 FakeDataMaker.patternMaker_ = function(pattern, base) {
   return pattern.replace(/x/g, function() {
     return Math.floor(Math.random() * base).toString(base);
   });
 };