Accessibility objects with layers shouldn't be ignored

chrome/browser/resources/chromeos/chromevox/cvox2/background/output_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.
 
 GEN_INCLUDE(['../../testing/assert_additions.js']);
 GEN_INCLUDE(['../../testing/chromevox_next_e2e_test_base.js']);
 
 /**
  * Gets the braille output and asserts that it matches expected values.
  * Annotations in the output that are primitive strings are ignored.
@@ skipping 194 matching lines @@
       checkBrailleOutput(
           'b h1',
           [{value: new Output.NodeSpan(el), start: 0, end: 4}],
           o);
   });
 });
 
 TEST_F('OutputE2ETest', 'Audio', function() {
   this.runWithLoadedTree('<audio src="foo.mp3" controls></audio>',
     function(root) {
-      var el = root.firstChild.firstChild.firstChild.firstChild;
+      var el = root.find({role: 'button'});
       var range = cursors.Range.fromNode(el);
       var o = new Output().withSpeechAndBraille(range, null, 'navigate');
 
       checkSpeechOutput('play|Button|begin playback|audio|Tool bar',
           [
             {value: new Output.EarconAction('BUTTON'), start: 0, end: 4},
             {value: 'description', start: 12, end: 26},
             {value: 'name', start: 27, end: 32},
             {value: 'role', start: 33, end: 41}
           ],
@@ skipping 419 matching lines @@
   this.runWithLoadedTree(function() {/*!
       <div><button>ok</button></div>
     */},
     function(root) {
       var div = root.find({role: 'div'});
       var o = new Output().withSpeech(cursors.Range.fromNode(div));
       assertEquals('ok|Button'
                    , o.speechOutputForTest.string_);
   });
 });