Bug 1207494 - Part 9: Remove use of expression closure from dom/indexedDB/. r=khuey

--HG--
extra : commitid : 9tEgENbueXg
extra : rebase_source : b23c853af0346325812e8a0a4ac42bb7c3ffae27

dom/indexedDB/test/browser_perwindow_privateBrowsing.js

@@ -42,9 +42,9 @@ function test2()
   var win = OpenBrowserWindow({private: true});
   win.addEventListener("load", function onLoad() {
     win.removeEventListener("load", onLoad, false);
-    executeSoon(function() test3(win));
+    executeSoon(() => test3(win));
   }, false);
-  registerCleanupFunction(function() win.close());
+  registerCleanupFunction(() => win.close());
 }
 
 function test3(win)