Site Settings Desktop: Support adding exceptions for incognito mode.

chrome/test/data/webui/settings/test_site_settings_prefs_browser_proxy.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.
 
 /**
  * An example empty pref.
  * @type {SiteSettingsPref}
  */
 var prefsEmpty = {
   defaults: {
@@ skipping 154 matching lines @@
       pref = this.prefs_.exceptions.unsandboxed_plugins;
     else
       console.log('getExceptionList received unknown category: ' + contentType);
 
     assert(pref != undefined, 'Pref is missing for ' + contentType);
     return Promise.resolve(pref);
   },
 
   /** @override */
   resetCategoryPermissionForOrigin: function(
-      primaryPattern, secondaryPattern, contentType) {
+      primaryPattern, secondaryPattern, contentType, incognito) {
     this.methodCalled('resetCategoryPermissionForOrigin',
-        [primaryPattern, secondaryPattern, contentType]);
+        [primaryPattern, secondaryPattern, contentType, incognito]);
     return Promise.resolve();
   },
 
   /** @override */
   setCategoryPermissionForOrigin: function(
-      primaryPattern, secondaryPattern, contentType, value) {
+      primaryPattern, secondaryPattern, contentType, value, incognito) {
     this.methodCalled('setCategoryPermissionForOrigin',
         [primaryPattern, secondaryPattern, contentType, value]);
     return Promise.resolve();
   },
 };