Bug 1162407 - Increase timeout value of test_replace_short_message_type.js. r=bevis

dom/mobilemessage/tests/marionette/test_replace_short_message_type.js

@@ -1,7 +1,7 @@
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
-MARIONETTE_TIMEOUT = 120000;
+MARIONETTE_TIMEOUT = 240000;
 MARIONETTE_HEAD_JS = 'head.js';
 
 const PDU_SMSC_NONE = "00"; // no SMSC Address