Implement update notifications for ChromeVox Next.

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

 // 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.
 
 /**
  * @fileoverview Provides output services for ChromeVox.
  */
 
 goog.provide('Output');
 goog.provide('Output.EventType');
@@ skipping 535 matching lines @@
   },
   menuListValueChanged: {
     'default': {
       speak: '$value $name ' +
           '$find({"state": {"selected": true, "invisible": false}}, ' +
               '@describe_index($indexInParent, $parentChildCount)) '
     }
   },
   alert: {
     default: {
-      speak: '!doNotInterrupt ' +
-          '@role_alert $name $earcon(ALERT_NONMODAL) $description $descendants'
+      speak: '!doNotInterrupt @role_alert ' +
+          '$if($name, $name, $descendants) $earcon(ALERT_NONMODAL) $description'
     }
   }
 };
 
 /**
  * Used to annotate utterances with speech properties.
  * @constructor
  */
 Output.SpeechProperties = function() {};
 
@@ skipping 1029 matching lines @@
           break;
         }
         earconFinder = earconFinder.parent;
       }
     }
     return null;
   }
 };
 
 });  // goog.scope