MD Settings: make blowing away per-origin data (i.e. cookies) easier

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 35 matching lines @@
  */
 var TestSiteSettingsPrefsBrowserProxy = function() {
   settings.TestBrowserProxy.call(this, [
     'fetchUsbDevices',
     'fetchZoomLevels',
     'getCookieDetails',
     'getDefaultValueForContentType',
     'getExceptionList',
     'observeProtocolHandlers',
     'observeProtocolHandlersEnabledState',
+    'reloadCookies',
+    'removeCookie',
     'removeProtocolHandler',
     'removeUsbDevice',
     'removeZoomLevel',
     'resetCategoryPermissionForOrigin',
     'setCategoryPermissionForOrigin',
     'setDefaultValueForContentType',
     'setProtocolDefault'
   ]);
 
   /** @private {!SiteSettingsPref} */
@@ skipping 172 matching lines @@
     return Promise.resolve();
   },
 
   /** @override */
   fetchZoomLevels: function() {
     cr.webUIListenerCallback('onZoomLevelsChanged', this.zoomList_);
     this.methodCalled('fetchZoomLevels');
   },
 
   /** @override */
+  reloadCookies: function() {
+    return Promise.resolve({id: null, children: []});
+  },
+
+  /** @override */
+  removeCookie: function(path) {
+    this.methodCalled('removeCookie', path);
+  },
+
+  /** @override */
   removeZoomLevel: function(host) {
     this.methodCalled('removeZoomLevel', [host]);
   },
 
   /** @override */
   fetchUsbDevices: function() {
     this.methodCalled('fetchUsbDevices');
     return Promise.resolve(this.usbDevices_);
   },
 
@@ skipping 18 matching lines @@
   /** @override */
   setProtocolDefault: function() {
     this.methodCalled('setProtocolDefault', arguments);
   },
 
   /** @override */
   removeProtocolHandler: function() {
     this.methodCalled('removeProtocolHandler', arguments);
   }
 };