Improve braille related message descriptions and clean up message handling in Chromevox.

chrome/browser/resources/chromeos/chromevox/common/command_store.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 This class acts as the persistent store for all static data
  * about commands.
  *
  * This store can safely be used within either a content or background script
@@ skipping 725 matching lines @@
   'heading5': {predicate: 'heading5Predicate',
                forwardError: 'no_next_heading_5',
                backwardError: 'no_previous_heading_5'},
   'heading6': {predicate: 'heading6Predicate',
                forwardError: 'no_next_heading_6',
                backwardError: 'no_previous_heading_6'},
 
   'link': {predicate: 'linkPredicate',
            forwardError: 'no_next_link',
            backwardError: 'no_previous_link',
-           typeMsg: 'aria_role_link'},
+           typeMsg: 'tag_link'},
   'table': {predicate: 'tablePredicate',
             forwardError: 'no_next_table',
             backwardError: 'no_previous_table',
             typeMsg: 'table_strategy'},
   'visitedLink': {predicate: 'visitedLinkPredicate',
             forwardError: 'no_next_visited_link',
             backwardError: 'no_previous_visited_link',
             typeMsg: 'tag_link'},
   'list': {predicate: 'listPredicate',
            forwardError: 'no_next_list',
@@ skipping 18 matching lines @@
   'media': {predicate: 'mediaPredicate',
             forwardError: 'no_next_media_widget',
             backwardError: 'no_previous_media_widget'},
   'section': {predicate: 'sectionPredicate',
            forwardError: 'no_next_section',
            backwardError: 'no_previous_section'},
   'control': {predicate: 'controlPredicate',
            forwardError: 'no_next_control',
            backwardError: 'no_previous_control'}
 };