Bug 1315867 - Disable test_presentation_sandboxed_presentation.html until its flaky use of setTimeout can be repaired

dom/presentation/tests/mochitest/mochitest.ini

@@ -71,6 +71,7 @@ skip-if = (e10s || toolkit == 'android')
 [test_presentation_sender_on_terminate_request.html]
 skip-if = toolkit == 'android'
 [test_presentation_sandboxed_presentation.html]
+skip-if = true # bug 1315867
 [test_presentation_reconnect.html]
 [test_presentation_mixed_security_contexts.html]
 [test_presentation_availability.html]