Only read out selected node in processing menuListItemSelected event.

chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js

 // Copyright 2015 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.
 
 /**
  * @fileoverview Handles automation from a desktop automation node.
  */
 
 goog.provide('DesktopAutomationHandler');
 
@@ skipping 32 matching lines @@
 
   var e = EventType;
   this.addListener_(e.activedescendantchanged, this.onActiveDescendantChanged);
   this.addListener_(e.alert, this.onAlert);
   this.addListener_(e.ariaAttributeChanged, this.onEventIfInRange);
   this.addListener_(e.checkedStateChanged, this.onEventIfInRange);
   this.addListener_(e.focus, this.onFocus);
   this.addListener_(e.hover, this.onEventWithFlushedOutput);
   this.addListener_(e.loadComplete, this.onLoadComplete);
   this.addListener_(e.menuEnd, this.onMenuEnd);
-  this.addListener_(e.menuListItemSelected, this.onEventDefault);
+  this.addListener_(e.menuListItemSelected, this.onEventIfSelected);
   this.addListener_(e.menuStart, this.onMenuStart);
   this.addListener_(e.scrollPositionChanged, this.onScrollPositionChanged);
   this.addListener_(e.selection, this.onEventWithFlushedOutput);
   this.addListener_(e.textChanged, this.onTextChanged);
   this.addListener_(e.textSelectionChanged, this.onTextSelectionChanged);
   this.addListener_(e.valueChanged, this.onValueChanged);
 
   AutomationObjectConstructorInstaller.init(node, function() {
     chrome.automation.getFocus((function(focus) {
       if (ChromeVoxState.instance.mode != ChromeVoxMode.FORCE_NEXT)
@@ skipping 75 matching lines @@
     // TODO(dtseng): Consider the end of the current range as well.
     if (AutomationUtil.isDescendantOf(
         global.backgroundObj.currentRange.start.node, evt.target) ||
             evt.target.state.focused)
       this.onEventDefault(evt);
   },
 
   /**
    * @param {!AutomationEvent} evt
    */
+  onEventIfSelected: function(evt) {
+    if (evt.target.state.selected)
+      this.onEventDefault(evt);
+  },
+
+  /**
+   * @param {!AutomationEvent} evt
+   */
   onEventWithFlushedOutput: function(evt) {
     Output.flushNextSpeechUtterance();
     this.onEventDefault(evt);
   },
 
   /**
    * Makes an announcement without changing focus.
    * @param {!AutomationEvent} evt
    */
   onActiveDescendantChanged: function(evt) {
@@ skipping 207 matching lines @@
   if (cvox.ChromeVox.isMac)
     return;
   chrome.automation.getDesktop(function(desktop) {
     global.desktopAutomationHandler = new DesktopAutomationHandler(desktop);
   });
 };
 
 DesktopAutomationHandler.init_();
 
 });  // goog.scope