[MD settings] clear incognito only checkbox

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

Index: chrome/test/data/webui/settings/site_list_tests.js
diff --git a/chrome/test/data/webui/settings/site_list_tests.js b/chrome/test/data/webui/settings/site_list_tests.js
index 76c91c9c8320d49e57c0800e67ef2e69b5461a16..179879f46acdd4b0c3ad6394c9e9695aaae92417 100644
--- a/chrome/test/data/webui/settings/site_list_tests.js
+++ b/chrome/test/data/webui/settings/site_list_tests.js
@@ -1161,12 +1161,26 @@ cr.define('site_list', function() {
       dialog.category = settings.ContentSettingsTypes.GEOLOCATION;
       dialog.contentSetting = settings.PermissionValues.ALLOW;
       document.body.appendChild(dialog);
+      dialog.open();
     });
 
     teardown(function() {
       dialog.remove();
     });
 
+    test('incognito', function() {
+      cr.webUIListenerCallback(
+          'onIncognitoStatusChanged',
+          /*hasIncognito=*/true);
+      assertFalse(dialog.$.incognito.checked);
+      dialog.$.incognito.checked = true;
+      // Changing the incognito status will reset the checkbox.
+      cr.webUIListenerCallback(
+          'onIncognitoStatusChanged',
+          /*hasIncognito=*/false);
+      assertFalse(dialog.$.incognito.checked);
+    });
+
     test('invalid input', function() {
       // Initially the action button should be disabled, but the error warning
       // should not be shown for an empty input.