[MD History] Add URL parameter for search.

chrome/test/data/webui/md_history/history_routing_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_routing_test', function() {
   function registerTests() {
     suite('synced-tabs', function() {
       var app;
       var list;
+      var toolbar;
 
       suiteSetup(function() {
         app = $('history-app');
         element = app.$['history-list'];
-        sidebar = app.$['history-side-bar']
+        sidebar = app.$['history-side-bar'];
+        toolbar = app.$['toolbar'];
       });
 
       test('changing route changes active view', function() {
         assertEquals('history', app.$.content.selected);
         app.set('route.path', '/syncedTabs');
         return flush().then(function() {
           assertEquals('syncedTabs', app.$.content.selected);
         });
       });
 
       test('route updates from sidebar', function() {
         var menu = sidebar.$.menu;
         assertEquals('/', app.route.path);
 
         MockInteractions.tap(menu.children[1]);
         assertEquals('/syncedTabs', app.route.path);
 
         MockInteractions.tap(menu.children[0]);
         assertEquals('/', app.route.path);
       });
 
+      test('route updates from search', function() {
+        var searchTerm = 'McCree';
+        assertEquals('/', app.route.path);
+        toolbar.setSearchTerm(searchTerm);
+        assertEquals(searchTerm, app.route.__queryParams.q);
+      });
+
+      test('search updates from route', function() {
+        var searchTerm = 'Mei';
+        assertEquals('history', app.$.content.selected);
+        app.set('route.__queryParams.q', searchTerm);
+        assertEquals(searchTerm, toolbar.searchTerm);
+      });
+
+      test('search preserved across menu items', function() {
+        var searchTerm = 'Soldier 76';
+        var menu = sidebar.$.menu;
+        assertEquals('/', app.route.path);
+        assertEquals('history', app.$.content.selected);
+        app.set('route.__queryParams.q', searchTerm);
+
+        MockInteractions.tap(menu.children[1]);
+        assertEquals('/syncedTabs', app.route.path);
+        assertEquals(searchTerm, app.route.__queryParams.q);
+        assertEquals(searchTerm, toolbar.searchTerm);
+
+        MockInteractions.tap(menu.children[0]);
+        assertEquals('/', app.route.path);
+        assertEquals(searchTerm, app.route.__queryParams.q);
+        assertEquals(searchTerm, toolbar.searchTerm);
+      });
+
       teardown(function() {
         app.set('route.path', '/');
+        app.set('route.__queryParams.q', null);
       });
     });
   }
   return {
     registerTests: registerTests
   };
 });