Fix alert dialog output.

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 397 matching lines @@
       braille: ''
     },
     abstractContainer: {
       enter: '$nameFromNode $role $description',
       leave: '@exited_container($role)'
     },
     alert: {
       speak: '!doNotInterrupt $role $descendants'
     },
     alertDialog: {
-      enter: '$nameFromNode $role $description $descendants'
+      enter: '$nameFromNode $role $description',
+      speak: '$name $role $descendants'
     },
     cell: {
       enter: '@column_granularity $tableCellColumnIndex'
     },
     checkBox: {
       speak: '$if($checked, $earcon(CHECK_ON), $earcon(CHECK_OFF)) ' +
              '$name $role $checked $description'
     },
     dialog: {
       enter: '$nameFromNode $role $description'
@@ skipping 1193 matching lines @@
           break;
         }
         earconFinder = earconFinder.parent;
       }
     }
     return null;
   }
 };
 
 });  // goog.scope