Make undefined Unicode characters show up in a nicer way in braille.

chrome/browser/resources/chromeos/chromevox/host/chrome/braille_table.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 Holds information about a braille table.
  */
 
 goog.provide('cvox.BrailleTable');
 
 
 /**
  * @typedef {{
  *   locale:string,
  *   dots:string,
  *   id:string,
  *   grade:(string|undefined),
  *   variant:(string|undefined),
- *   fileName:string
+ *   fileNames:string
  * }}
  */
 cvox.BrailleTable.Table;
 
 
 /**
  * @const {string}
  */
 cvox.BrailleTable.TABLE_PATH = 'chromevox/background/braille/tables.json';
 
 
 /**
+ * @const {string}
+ * @private
+ */
+cvox.BrailleTable.COMMON_DEFS_FILENAME_ = 'cvox-common.cti';
+
+
+/**
  * Retrieves a list of all available braille tables.
  * @param {function(!Array.<cvox.BrailleTable.Table>)} callback
  */
 cvox.BrailleTable.getAll = function(callback) {
+  function appendCommonFilename(tables) {
+    // Append the common definitions to all table filenames.
+    tables.forEach(function(table) {
+      table.fileNames += (',' + cvox.BrailleTable.COMMON_DEFS_FILENAME_);
+    });
+    return tables;
+  }
   var url = chrome.extension.getURL(cvox.BrailleTable.TABLE_PATH);
   if (!url) {
     throw 'Invalid path: ' + cvox.BrailleTable.TABLE_PATH;
   }
 
   var xhr = new XMLHttpRequest();
   xhr.open('GET', url, true);
   xhr.onreadystatechange = function() {
     if (xhr.readyState == 4) {
       if (xhr.status == 200) {
-        callback(/** @type {!Array.<cvox.BrailleTable.Table>} */ (
-            JSON.parse(xhr.responseText)));
+        callback(
+            appendCommonFilename(
+                /** @type {!Array.<cvox.BrailleTable.Table>} */ (
+                    JSON.parse(xhr.responseText))));
       }
     }
   };
   xhr.send();
 };
 
 
 /**
  * Finds a table in a list of tables by id.
  * @param {!Array.<cvox.BrailleTable.Table>} tables tables to search in.
@@ skipping 49 matching lines @@
     return msgs.getMsg('braille_table_name_with_grade',
                        [localeName, table.grade]);
   } else if (!table.grade && table.variant) {
     return msgs.getMsg('braille_table_name_with_variant',
                        [localeName, table.variant]);
   } else {
     return msgs.getMsg('braille_table_name_with_variant_and_grade',
                        [localeName, table.variant, table.grade]);
   }
 };