Bug 984274 - Disable test_sandbox_permission.html for frequent failures on a CLOSED TREE.

b2g/components/test/mochitest/mochitest.ini

@@ -1,4 +1,5 @@
 [DEFAULT]
+run-if = toolkit == "gonk"
 support-files =
   permission_handler_chrome.js
   SandboxPromptTest.html
@@ -6,11 +7,8 @@ support-files =
   systemapp_helper.js
 
 [test_sandbox_permission.html]
-run-if = toolkit == "gonk"
+skip-if = true # bug 984274 - frequent timeouts
 [test_filepicker_path.html]
-run-if = toolkit == "gonk"
 [test_permission_deny.html]
-run-if = toolkit == "gonk"
 [test_permission_gum_remember.html]
-run-if = toolkit == "gonk"
 [test_systemapp.html]