diff -r 000000000000 -r 6474c204b198 dom/workers/test/fileSubWorker_worker.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/workers/test/fileSubWorker_worker.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+/**
+ * Expects a file. Returns an object containing the size, type, name and path
+ * using another worker. Used to test posting of file from worker to worker.
+ */
+onmessage = function(event) {
+  var worker = new Worker("file_worker.js");
+
+  worker.postMessage(event.data);
+
+  worker.onmessage = function(event) {
+    postMessage(event.data);
+  }
+
+  worker.onerror = function(event) {
+    postMessage(undefined);
+  }
+};