Issue #1333292 by dcam, mgifford | Everett Zufelt: Screen-reader users receive...

Issue #1333292 by dcam, mgifford | Everett Zufelt: Screen-reader users receive no info about file upload errors.

CHANGELOG.txt

 
 Drupal 7.28, xxxx-xx-xx (development version)
 -----------------------
+- Improved screen reader support by adding an aria-live HTML attribute to file
+  upload fields when there is an error uploading the file (minor markup
+  change).
 - Made the pager on the Tracker module listing pages show the same number of
   items as other pagers throughout Drupal core (minor UI change).
 - Fixed a bug which caused caches not to be properly cleared when a file entity

modules/file/file.js

@@ -83,7 +83,7 @@ Drupal.file = Drupal.file || {
           '%filename': this.value.replace('C:\\fakepath\\', ''),
           '%extensions': extensionPattern.replace(/\|/g, ', ')
         });
-        $(this).closest('div.form-managed-file').prepend('<div class="messages error file-upload-js-error">' + error + '</div>');
+        $(this).closest('div.form-managed-file').prepend('<div class="messages error file-upload-js-error" aria-live="polite">' + error + '</div>');
         this.value = '';
         return false;
       }