MD Settings: Fix site data details regression and add test.

chrome/browser/resources/settings/site_settings/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.
 
 /**
  * @fileoverview A helper object used from the "Site Settings" section to
  * interact with the content settings prefs.
  */
 
 /**
@@ skipping 88 matching lines @@
     /**
      * Sets the default value for a site settings category.
      * @param {string} contentType The name of the category to change.
      * @param {string} defaultValue The name of the value to set as default.
      */
     setDefaultValueForContentType: function(contentType, defaultValue) {},
 
     /**
      * Gets the cookie details for a particular site.
      * @param {string} site The name of the site.
-     * @return {!Promise<!CookieDataSummaryItem>}
+     * @return {!Promise<!CookieList>}
      */
     getCookieDetails: function(site) {},
 
     /**
      * Gets the default value for a site settings category.
      * @param {string} contentType The name of the category to query.
      * @return {!Promise<!DefaultContentSetting>}
      */
     getDefaultValueForContentType: function(contentType) {},
 
@@ skipping 296 matching lines @@
     removeZoomLevel: function(host) {
       chrome.send('removeZoomLevel', [host]);
     },
   };
 
   return {
     SiteSettingsPrefsBrowserProxy: SiteSettingsPrefsBrowserProxy,
     SiteSettingsPrefsBrowserProxyImpl: SiteSettingsPrefsBrowserProxyImpl,
   };
 });