[MD History] Use openForeignSession message to open foreign session tabs.

chrome/test/data/webui/md_history/md_history_browsertest.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 Test suite for the Material Design history page.
  */
 
 var ROOT_PATH = '../../../../../';
 
@@ skipping 104 matching lines @@
 MaterialHistoryWithQueryParamTest.prototype = {
   __proto__: MaterialHistoryBrowserTest.prototype,
 
   browsePreload: 'chrome://history?q=query',
 
   /** @override */
   setUp: function() {
     PolymerTest.prototype.setUp.call(this);
 
     suiteSetup(function() {
-      var upgraded = false;

[tsergeant, 2016/07/22 03:21:17]

You need to rebase, this line doesn't exist on master.

[calamity, 2016/07/27 05:22:07]

Done.

-
       // This message handler needs to be registered before the test since the
       // query can happen immediately after the element is upgraded. However,
       // since there may be a delay as well, the test might check the global var
       // too early as well. In this case the test will have overtaken the
       // callback.
       registerMessageCallback('queryHistory', this, function (info) {
         window.historyQueryInfo = info;
       });
 
       // Wait for the top-level app element to be upgraded.
       return waitForUpgrade($('history-app')).then(function() {
         upgraded = true;
       });
     });
   },
 };
 
 TEST_F('MaterialHistoryWithQueryParamTest', 'RoutingTestWithQueryParam',
   function() {
     md_history.history_routing_test_with_query_param.registerTests();
     mocha.run();
 });