remove unnecessary paper-item dependency from site_details.

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

 // Copyright 2015 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 Suite of tests for site-details. */
 cr.define('site_details', function() {
   function registerTests() {
     suite('SiteDetails', function() {
       /**
        * A site list element created before each test.
@@ skipping 125 matching lines @@
         var category = settings.ContentSettingsTypes.NOTIFICATIONS;
         var site = {
           origin: 'http://www.google.com',
           originForDisplay: 'http://www.google.com',
           embeddingOrigin: '',
         };
         browserProxy.setPrefs(prefsEmpty);
         testElement.category = category;
         testElement.site = site
 
-        assertTrue(testElement.$.usage.hidden);
-        assertTrue(testElement.$.storage.hidden);
+        //expect usage to not be rendered

[Dan Beam, 2016/11/18 16:48:07]

I don't think this comment adds much

+        assertFalse(!!testElement.$$('#usage'));
 
         // TODO(finnur): Check for the Permission heading hiding when no
         // permissions are showing.
 
         var msg = 'No category should be showing, height';
         assertEquals(0, testElement.$.camera.offsetHeight, msg);
         assertEquals(0, testElement.$.cookies.offsetHeight, msg);
         assertEquals(0, testElement.$.geolocation.offsetHeight, msg);
         assertEquals(0, testElement.$.javascript.offsetHeight, msg);
         assertEquals(0, testElement.$.mic.offsetHeight, msg);
@@ skipping 40 matching lines @@
         testElement.$.usageApi = api;
         Polymer.dom(parent).appendChild(api);
 
         browserProxy.setPrefs(prefs);
         testElement.site = {
           origin: 'https://foo-allow.com:443',
           originForDisplay: 'https://foo-allow.com:443',
           embeddingOrigin: '',
         };
 
-        assertFalse(testElement.$.usage.hidden);
-        assertFalse(testElement.$.storage.hidden);
+        Polymer.dom.flush();
+
+        //expect usage to be rendered

[Dan Beam, 2016/11/18 16:48:07]

// Expect usage to be rendered.

+        assertTrue(!!testElement.$$('#usage'));
       });
     });
   }
   return {
     registerTests: registerTests,
   };
 });