Support group and wrapping navigation.

chrome/browser/resources/chromeos/chromevox/cvox2/background/background_test.extjs

 // Copyright 2014 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.
 
 // Include test fixture.
 GEN_INCLUDE(['../../testing/chromevox_next_e2e_test_base.js',
              '../../testing/assert_additions.js']);
 
 GEN_INCLUDE(['../../testing/mock_feedback.js']);
 
@@ skipping 1107 matching lines @@
 
 TEST_F('BackgroundTest', 'HeadingLevels', function() {
   var mockFeedback = this.createMockFeedback();
   this.runWithLoadedTree(function(root) {/*!
     <h1>1</h1><h2>2</h2><h3>3</h3><h4>4</h4><h5>5</h5><h6>6</h6>
   */}, function(root) {
     var makeLevelAssertions = function(level) {
       mockFeedback.call(doCmd('nextHeading' + level))
           .expectSpeech('Heading ' + level)
           .call(doCmd('nextHeading' + level))
-          .expectSpeech('No next level ' + level + ' heading.')
+          .expectEarcon('wrap')
           .call(doCmd('previousHeading' + level))
-          .expectSpeech('No previous level ' + level + ' heading.');
+          .expectEarcon('wrap');
     };
     for (var i = 1; i <= 6; i++)
       makeLevelAssertions(i);
     mockFeedback.replay();
   });
 });
 
 TEST_F('BackgroundTest', 'EditableNavigation', function() {
   var mockFeedback = this.createMockFeedback();
   this.runWithLoadedTree(function(root) {/*!
@@ skipping 17 matching lines @@
     <input type="text"></input>
   */}, function(root) {
     this.listenOnce(root, 'focus', function(e) {
       var focus = ChromeVoxState.instance.currentRange.start.node;
       assertEquals(RoleType.textField, focus.role);
       assertTrue(focus.state.focused);
     });
     doCmd('nextEditText')();
   });
 });