Only read out selected node in processing menuListItemSelected event.

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 612 matching lines @@
   this.runWithLoadedTree(this.iframesDoc, function(rootNode) {
     chrome.automation.getDesktop(function(desktopNode) {
       runTestIfIframeIsLoaded(rootNode);
 
       desktopNode.addEventListener('loadComplete', function(evt) {
         runTestIfIframeIsLoaded(rootNode);
       }, true);      
     });
   });
 });
+
+TEST_F('BackgroundTest', 'SelectOptionSelected', function() {
+  var mockFeedback = this.createMockFeedback();
+  this.runWithLoadedTree(function() {/*!
+    <select>
+      <option>apple
+      <option>banana
+      <option>grapefruit
+    </select>
+  */}, function(root) {
+    var select = root.find({role: 'popUpButton'});
+    var clickSelect = select.doDefault.bind(select);
+    var lastOption = select.lastChild.lastChild;
+    var selectLastOption = lastOption.doDefault.bind(lastOption);
+
+    mockFeedback.call(clickSelect)
+        .expectSpeech('apple')
+        .expectSpeech('Button')
+        .call(selectLastOption)
+        .expectNextSpeechUtteranceIsNot('apple')
+        .expectSpeech('grapefruit')
+        .replay();
+  });
+});