import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/tests/mochitest/fetch/worker_temporaryFileBlob.js

@@ -0,0 +1,21 @@
+importScripts('common_temporaryFileBlob.js');
+
+function info(msg) {
+  postMessage({type: 'info', msg: msg});
+}
+
+function ok(a, msg) {
+  postMessage({type: 'check', what: !!a, msg: msg});
+}
+
+function is(a, b, msg) {
+  ok(a === b, msg);
+}
+
+function next() {
+  postMessage({type: 'finish'});
+}
+
+onmessage = function(e) {
+  test_basic();
+}