diff -r 000000000000 -r 6474c204b198 mobile/android/base/sync/repositories/delegates/RepositorySessionCreationDelegate.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/sync/repositories/delegates/RepositorySessionCreationDelegate.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+/* 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/. */
+
+package org.mozilla.gecko.sync.repositories.delegates;
+
+import org.mozilla.gecko.sync.repositories.RepositorySession;
+
+// Used to provide the sessionCallback and storeCallback
+// mechanism to repository instances.
+public interface RepositorySessionCreationDelegate {
+  public void onSessionCreateFailed(Exception ex);
+  public void onSessionCreated(RepositorySession session);
+  public RepositorySessionCreationDelegate deferredCreationDelegate();
+}
\ No newline at end of file