diff -r 000000000000 -r 6474c204b198 dom/workers/test/url_worker.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/workers/test/url_worker.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,82 @@
+onmessage = function(event) {
+  if (event.data != 0) {
+    var worker = new Worker('url_worker.js');
+    worker.onmessage = function(event) {
+      postMessage(event.data);
+    }
+
+    worker.postMessage(event.data - 1);
+    return;
+  }
+
+  status = false;
+  try {
+    if ((URL instanceof Object)) {
+      status = true;
+    }
+  } catch(e) {
+  }
+
+  postMessage({type: 'status', status: status, msg: 'URL object:' + URL});
+
+  status = false;
+  var blob = null;
+  try {
+    blob = new Blob([]);
+    status = true;
+  } catch(e) {
+  }
+
+  postMessage({type: 'status', status: status, msg: 'Blob:' + blob});
+
+  status = false;
+  var url = null;
+  try {
+    url = URL.createObjectURL(blob);
+    status = true;
+  } catch(e) {
+  }
+
+  postMessage({type: 'status', status: status, msg: 'Blob URL:' + url});
+
+  status = false;
+  try {
+    URL.revokeObjectURL(url);
+    status = true;
+  } catch(e) {
+  }
+
+  postMessage({type: 'status', status: status, msg: 'Blob Revoke URL'});
+
+  status = false;
+  var url = null;
+  try {
+    url = URL.createObjectURL(true);
+  } catch(e) {
+    status = true;
+  }
+
+  postMessage({type: 'status', status: status, msg: 'CreateObjectURL should fail if the arg is not a blob'});
+
+  status = false;
+  var url = null;
+  try {
+    url = URL.createObjectURL(blob);
+    status = true;
+  } catch(e) {
+  }
+
+  postMessage({type: 'status', status: status, msg: 'Blob URL2:' + url});
+  postMessage({type: 'url', url: url});
+
+  status = false;
+  try {
+    URL.createObjectURL(new Object());
+  } catch(e) {
+    status = true;
+  }
+
+  postMessage({type: 'status', status: status, msg: 'Exception wanted' });
+
+  postMessage({type: 'finish' });
+}