Bug 1167492 - Part 1: Update script and patches. r=giles

[US Regulation] To Create Settings for Configuring Default Attributes of WebVTT.

dom/media/webvtt/update-webvtt.js

@@ -41,6 +41,8 @@ repo.status(function(err, status) {
         ' * License, v. 2.0. If a copy of the MPL was not distributed with this\n' +
         ' * file, You can obtain one at http://mozilla.org/MPL/2.0/. */\n\n' +
         'this.EXPORTED_SYMBOLS = ["WebVTT"];\n\n' +
+        'const Cu = Components.utils;\n' +
+        'Cu.import("resource://gre/modules/Services.jsm");\n\n' +
         '/**\n' +
         ' * Code below is vtt.js the JS WebVTT implementation.\n' +
         ' * Current source code can be found at http://github.com/mozilla/vtt.js\n' +