Bug 1177774 - Update SharedPreferencesImpl constructor arg. r=nalexander

--HG--
extra : commitid : 6EcWFEEbhld
extra : rebase_source : 34275327b18884317f9bfbfd6b6b4004cf239e9d

mobile/android/modules/SharedPreferences.jsm

@@ -61,7 +61,7 @@ let SharedPreferences = {
  */
 function SharedPreferencesImpl(options = {}) {
   if (!(this instanceof SharedPreferencesImpl)) {
-    return new SharedPreferencesImpl(level);
+    return new SharedPreferencesImpl(options);
   }
 
   if (options.scope == null || options.scope == undefined) {