MD History: Add routing for grouped history mode.

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 155 matching lines @@
 TEST_F('MaterialHistoryRoutingTest', 'All', function() {
   md_history.history_routing_test.registerTests();
   mocha.run();
 });
 
 function MaterialHistoryRoutingWithQueryParamTest() {}
 
 MaterialHistoryRoutingWithQueryParamTest.prototype = {
   __proto__: MaterialHistoryRoutingTest.prototype,
 
-  browsePreload: 'chrome://history?q=query',
+  browsePreload: 'chrome://history/history/week?q=query&offset=5',
+
+  commandLineSwitches:
+      MaterialHistoryBrowserTest.prototype.commandLineSwitches.concat([
+        {switchName: 'enable-grouped-history'}
+      ]),
 
   /** @override */
   setUp: function() {
     PolymerTest.prototype.setUp.call(this);
     // 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) {
@@ skipping 54 matching lines @@
   __proto__: MaterialHistoryBrowserTest.prototype,
 
   extraLibraries: MaterialHistoryBrowserTest.prototype.extraLibraries.concat([
     'history_toolbar_test.js',
   ]),
 };
 
 TEST_F('MaterialHistoryToolbarTest', 'All', function() {
   mocha.run();
 });