MD History: Add icon in top right of page when showing synced results

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 app;
       var element;
       var toolbar;
       var TEST_HISTORY_RESULTS;
 
       suiteSetup(function() {
-        app = $('history-app');
+        TEST_HISTORY_RESULTS =
+            [createHistoryEntry('2016-03-15', 'https://google.com')];
+      });
+
+      setup(function() {
+        app = replaceApp();
         element = app.$['history'].$['infinite-list'];
         toolbar = app.$['toolbar'];
-        TEST_HISTORY_RESULTS =
-            [createHistoryEntry('2016-03-15', 'https://google.com')];
+        return flush();
       });
 
       test('selecting checkbox causes toolbar to change', function() {
         element.addNewResults(TEST_HISTORY_RESULTS);
 
         return flush().then(function() {
           var item = element.$$('history-item');
           MockInteractions.tap(item.$.checkbox);
 
           // Ensure that when an item is selected that the count held by the
@@ skipping 54 matching lines @@
           assertTrue(toolbar.spinnerActive);
           app.historyResult(createHistoryInfo(), TEST_HISTORY_RESULTS);
           assertFalse(toolbar.spinnerActive);
           done();
         });
 
         toolbar.$$('cr-toolbar').fire('search-changed', 'Test2');
       });
 
       teardown(function() {
-        element.historyData_ = [];
-        element.searchedTerm = '';
-        registerMessageCallback('queryHistory', this, undefined);
-        toolbar.count = 0;
+        registerMessageCallback('queryHistory', this, function() {});
+        app.set('queryState_.searchTerm', '');

[calamity, 2016/09/13 03:12:24]

Why is this set necessary?

[tsergeant, 2016/09/13 04:03:06]

When this test runs, the search term changes and so the URL changes to
chrome://history/?q=something. This URL doesn't get reset when the app is
replaced, and so it keeps the tests from being independent.

(This whole file does not -need- to be changed as part of this CL, it's just
cleanup I did while looking at it. I can come back and do it separately if you
prefer).

       });
     });
   }
   return {
     registerTests: registerTests
   };
 });
 
 
 cr.define('md_history.history_toolbar_focus_test', function() {
@@ skipping 38 matching lines @@
                 .getSearchField()
                 .isSearchFocused());
       });
     });
   };
 
   return {
     registerTests: registerTests
   };
 });