Safari: use self instead of window, just in case

platform/safari/vapi-common.js

@@ -143,6 +143,6 @@ Number.prototype.toLocaleString = function() {
 // This storage is optional, but it is nice to have, for a more polished user
 // experience.
 
-vAPI.localStorage = window.localStorage;
+vAPI.localStorage = self.localStorage;
 
 })();