1 files changed, 21 insertions, 0 deletions
diff --git a/browser/components/sessionstore/SessionWorker.jsm b/browser/components/sessionstore/SessionWorker.jsm
new file mode 100644
index 0000000000..d901759c66
--- /dev/null
+++ b/browser/components/sessionstore/SessionWorker.jsm
@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * Interface to a dedicated thread handling I/O
+ */
+
+ChromeUtils.import("resource://gre/modules/PromiseWorker.jsm", this);
+ChromeUtils.import("resource://gre/modules/osfile.jsm", this);
+
+var EXPORTED_SYMBOLS = ["SessionWorker"];
+
+var SessionWorker = new BasePromiseWorker(
+  "resource:///modules/sessionstore/SessionWorker.js"
+);
+// As the Session Worker performs I/O, we can receive instances of
+// OS.File.Error, so we need to install a decoder.
+SessionWorker.ExceptionHandlers["OS.File.Error"] = OS.File.Error.fromMsg;