Transfer SecurityOrigin overrides to Workers.

LayoutTests/http/tests/xmlhttprequest/resources/insecure-xhr.js

Index: LayoutTests/http/tests/xmlhttprequest/resources/insecure-xhr.js
diff --git a/LayoutTests/http/tests/xmlhttprequest/resources/insecure-xhr.js b/LayoutTests/http/tests/xmlhttprequest/resources/insecure-xhr.js
new file mode 100644
index 0000000000000000000000000000000000000000..597ba975776de260fad8c58595ce5e4141032f84
--- /dev/null
+++ b/LayoutTests/http/tests/xmlhttprequest/resources/insecure-xhr.js
@@ -0,0 +1,18 @@
+function finish() {
+    if (self.importScripts)
+        postMessage('done');
+    else if (window.opener)
+        window.opener.postMessage('done', '*');
+}
+
+var xhr = new XMLHttpRequest();
+xhr.open("GET", "http://localhost:8000/xmlhttprequest/resources/echo-request-origin.php");
+xhr.onload = function (e) {
+    console.log("PASS: " + xhr.responseText);
+    finish();
+};
+xhr.onerror = function (e) {
+    console.log("FAIL: " + xhr.status);
+    finish();
+};
+xhr.send();