[MD settings] clear incognito only checkbox

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

Index: chrome/test/data/webui/settings/test_site_settings_prefs_browser_proxy.js
diff --git a/chrome/test/data/webui/settings/test_site_settings_prefs_browser_proxy.js b/chrome/test/data/webui/settings/test_site_settings_prefs_browser_proxy.js
index 29a10f435cc7fbc600d0d2ec7cabbe069468a999..ba078228eb6623585516b6f9441a203472007696 100644
--- a/chrome/test/data/webui/settings/test_site_settings_prefs_browser_proxy.js
+++ b/chrome/test/data/webui/settings/test_site_settings_prefs_browser_proxy.js
@@ -93,7 +93,8 @@ var TestSiteSettingsPrefsBrowserProxy = function() {
     'resetCategoryPermissionForOrigin',
     'setCategoryPermissionForOrigin',
     'setDefaultValueForContentType',
-    'setProtocolDefault'
+    'setProtocolDefault',
+    'updateIncognitoStatus',
   ]);
 
   /** @private {boolean} */
@@ -371,5 +372,10 @@ TestSiteSettingsPrefsBrowserProxy.prototype = {
   /** @override */
   removeProtocolHandler: function() {
     this.methodCalled('removeProtocolHandler', arguments);
+  },
+
+  /** @override */
+  updateIncognitoStatus: function() {
+    this.methodCalled('updateIncognitoStatus', arguments);
   }
 };