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

chrome/browser/resources/chromeos/chromevox/common/aria_util.js

Index: chrome/browser/resources/chromeos/chromevox/common/aria_util.js
diff --git a/chrome/browser/resources/chromeos/chromevox/common/aria_util.js b/chrome/browser/resources/chromeos/chromevox/common/aria_util.js
index 734a5bbc843c88d7f2df28c367d9ce89d7ba2900..2dfbc7064e55e95c2c50d94e4031a2476cbb3966 100644
--- a/chrome/browser/resources/chromeos/chromevox/common/aria_util.js
+++ b/chrome/browser/resources/chromeos/chromevox/common/aria_util.js
@@ -40,7 +40,7 @@ cvox.AriaUtil.WIDGET_ROLE_TO_NAME = {
   'dialog' : 'aria_role_dialog',
   'grid' : 'aria_role_grid',
   'gridcell' : 'aria_role_gridcell',
-  'link' : 'aria_role_link',
+  'link' : 'tag_link',

[dmazzoni, 2015/09/25 16:23:35]

Slightly confusing to me because the tag name for a hyperlink isn't "link", and
there is a <link> tag that means something else

What about getting rid of the "aria_" from most of the messages for role names?
role_link is totally clear, and there are a few other cases where we have a role
that can come from an ARIA role or from native HTML.

   'listbox' : 'aria_role_listbox',
   'log' : 'aria_role_log',
   'marquee' : 'aria_role_marquee',
@@ -345,7 +345,7 @@ cvox.AriaUtil.getRoleNameMsg = function(targetNode) {
  */
 cvox.AriaUtil.getRoleName = function(targetNode) {
   var roleMsg = cvox.AriaUtil.getRoleNameMsg(targetNode);
-  var roleName = cvox.ChromeVox.msgs.getMsg(roleMsg);
+  var roleName = Msgs.getMsg(roleMsg);
   var role = cvox.AriaUtil.getRoleAttribute(targetNode);
   if ((role == 'heading') && (targetNode.hasAttribute('aria-level'))) {
     roleName += ' ' + targetNode.getAttribute('aria-level');