MD WebUI: Add shared cr-toolbar element

chrome/test/data/webui/md_history/history_toolbar_test.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.
 
 cr.define('md_history.history_toolbar_test', function() {
   function registerTests() {
     suite('history-toolbar', function() {
       var element;
       var toolbar;
       var TEST_HISTORY_RESULTS;
@@ skipping 37 matching lines @@
           done();
         });
 
         toolbar.onSearch('Test');
       });
 
       test('more from this site sends and sets correct data', function(done) {
         registerMessageCallback('queryHistory', this, function (info) {
           assertEquals('example.com', info[0]);
           flush(function() {
-            assertEquals(toolbar.$$('#search-input').$$('#search-input').value,
-                'example.com');
+            assertEquals(
+                'example.com',
+                toolbar.$['main-toolbar'].getSearchField().getValue());
             done();
           });
         });
 
         element.$.sharedMenu.itemData = {domain: 'example.com'};
         MockInteractions.tap(element.$.menuMoreButton);
       });
 
       teardown(function() {
         element.historyData_ = [];
         element.searchedTerm = '';
         registerMessageCallback('queryHistory', this, undefined);
         toolbar.count = 0;
       });
     });
   }
   return {
     registerTests: registerTests
   };
 });