[MD History] Fix toolbar dates in grouped mode.

chrome/test/data/webui/md_history/history_grouped_list_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.
 
 suite('history-grouped-list', function() {
   var app;
   var toolbar;
   var groupedList;
   var sidebar;
   var listContainer;
@@ skipping 60 matching lines @@
     assertEquals('history', sidebar.$.menu.selected);
 
     app.set('queryState_.range', HistoryRange.MONTH);
     assertEquals('grouped-list', content.selected);
     assertEquals('history', sidebar.$.menu.selected);
   });
 
   test('items grouped by domain', function() {
     app.set('queryState_.range', HistoryRange.WEEK);
     var info = createHistoryInfo();
-    info.queryStartTime = 'Yesterday';
-    info.queryEndTime = 'Now';
     app.historyResult(info, SIMPLE_RESULTS);
     return PolymerTest.flushTasks().then(function() {
       var data = groupedList.groupedHistoryData_;
       // 1 card for the day with 3 domains.
       assertEquals(1, data.length);
       assertEquals(3, data[0].domains.length);
 
       // Most visits at the top.
       assertEquals(2, data[0].domains[0].visits.length);
       assertEquals(1, data[0].domains[1].visits.length);
       assertEquals(1, data[0].domains[2].visits.length);
+    });
+  });
 
-      // Ensure the toolbar displays the correct begin and end time.
-      assertEquals('Yesterday', toolbar.queryStartTime);
-      assertEquals('Now', toolbar.queryEndTime);
-    });
+  test('toolbar dates appear in grouped mode', function() {
+    var getInfo = function() {
+      var info = createHistoryInfo();
+      info.queryStartMonth = 'Dec 2016';
+      info.queryInterval = 'Yesterday - Now';
+      return info;
+    };
+    app.set('queryState_.range', HistoryRange.MONTH);
+    app.historyResult(getInfo(), SIMPLE_RESULTS);
+    assertEquals(
+        'Dec 2016', toolbar.$$('#grouped-date').textContent.trim());
+
+    app.set('queryState_.range', HistoryRange.WEEK);
+    app.historyResult(getInfo(), SIMPLE_RESULTS);
+    assertEquals(
+        'Yesterday - Now', toolbar.$$('#grouped-date').textContent.trim());
   });
 
   test('items grouped by day in week view', function() {
     app.set('queryState_.range', HistoryRange.WEEK);
     app.historyResult(createHistoryInfo(), PER_DAY_RESULTS);
     return PolymerTest.flushTasks().then(function() {
       var data = groupedList.groupedHistoryData_;
 
       // 3 cards.
       assertEquals(3, data.length);
@@ skipping 183 matching lines @@
           children: [],
         },
       ],
     };
 
     assertEquals(
         JSON.stringify(expected),
         JSON.stringify(groupedList.buildRemovalTree_(paths)));
   });
 });