Update Autofill Private API to provide a list of available countries.

chrome/test/data/extensions/api_test/autofill_private/test.js

 // Copyright 2015 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.
 
 // This just tests the interface. It does not test for specific results, only
 // that callbacks are correctly invoked, expected parameters are correct,
 // and failures are detected.
 
 var availableTests = [
   function saveAddress() {
@@ skipping 11 matching lines @@
         chrome.test.assertEq(address.fullNames[0], NAME);
         chrome.test.succeed();
       }
     }
 
     chrome.autofillPrivate.onAddressListChanged.addListener(handler);
     chrome.autofillPrivate.getAddressList(handler);
     chrome.autofillPrivate.saveAddress({fullNames: [NAME]});
   },
 
+  function getCountryList() {
+    var handler = function(countries) {
+      var numSeparators = 0;
+      var countBeforeSeparator = 0;
+      var countAfterSeparator = 0;
+
+      var beforeSeparator = true;
+
+      chrome.test.assertTrue(countries.length > 1,
+          'Expected more than one country');
+
+      countries.forEach(function(country) {
+        // Expecting to have both |name| and |countryCode| or neither.
+        chrome.test.assertEq(!!country.name, !!country.countryCode);
+
+        if (country.name) {
+          if (beforeSeparator)
+            ++countBeforeSeparator;
+          else
+            ++countAfterSeparator;
+        } else {
+          beforeSeparator = false;
+          ++numSeparators;
+        }
+      });
+
+      chrome.test.assertEq(1, numSeparators);
+      chrome.test.assertEq(1, countBeforeSeparator);
+      chrome.test.assertTrue(countAfterSeparator > 1,
+          'Expected more than one country after the separator');
+
+      chrome.test.succeed();
+    };
+
+    chrome.autofillPrivate.getCountryList(handler);
+  },
+
   function getAddressComponents() {
     var COUNTRY_CODE = 'US';
 
     var handler = function(components) {
       chrome.test.assertTrue(!!components.components);
       chrome.test.assertTrue(!!components.components[0]);
       chrome.test.assertTrue(!!components.components[0].row);
       chrome.test.assertTrue(!!components.components[0].row[0]);
       chrome.test.assertTrue(!!components.components[0].row[0].field);
       chrome.test.assertTrue(!!components.components[0].row[0].fieldName);
@@ skipping 98 matching lines @@
       indexOfNewNumber: 0,
       countryCode: COUNTRY_CODE
     }, handler1);
   },
 ];
 
 var testToRun = window.location.search.substring(1);
 chrome.test.runTests(availableTests.filter(function(op) {
   return op.name == testToRun;
 }));