Transfer serviceworker state during cross site navigations too.

content/test/data/service_worker/cross_site_xfer.js

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+this.onfetch = function(event) {
+  if (event.request.url.indexOf(
+        'cross_site_xfer_confirm_via_serviceworker.html') != -1) {
+    event.respondWith(fetch('cross_site_xfer_confirm.html'));
+    return;
+  }
+  if (event.request.url.indexOf('cross_site_xfer_subresource') != -1) {
+    event.respondWith(new Response(new Blob(['Hello'])));
+    return;
+  }
+};