diff -r 000000000000 -r 6474c204b198 mobile/android/base/sync/synchronizer/UnbundleError.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/sync/synchronizer/UnbundleError.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+/* 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.synchronizer;
+
+import org.mozilla.gecko.sync.SyncException;
+import org.mozilla.gecko.sync.repositories.RepositorySession;
+
+public class UnbundleError extends SyncException {
+  private static final long serialVersionUID = -8709503281041697522L;
+
+  public RepositorySession failedSession;
+
+  public UnbundleError(Exception e, RepositorySession session) {
+    super(e);
+    this.failedSession = session;
+  }
+}