Forward 31842.

mojo/devtools/common/remote_adb_setup

 #!/bin/bash
 # Copyright 2015 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.
 
 if [[ $# -ne 1 && $# -ne 2 ]]; then
   cat <<'EOF'
 Usage: remote_adb_setup REMOTE_HOST [REMOTE_ADB]
 
 Configures adb on a remote machine to communicate with a device attached to the
@@ skipping 28 matching lines @@
 # Start the adb server locally.
 adb start-server
 
 # Forward various ports from the remote host to the local host:
 #   5037: adb
 # and from the local host to the remote host:
 #   8181: Flutter observatory
 #   9998: http server for Flutter
 #   31839: http server for https://core.mojoapps.io
 #   31840: http server for the local mojo: origin
-#   31841: http server for base mappings
+#   31841-31842: http servers for origin mappings
 ssh -C \
     -R 5037:127.0.0.1:5037 \
     -L 8181:127.0.0.1:8181 \
     -L 9998:127.0.0.1:9998 \
     -L 31839:127.0.0.1:31839 \
     -L 31840:127.0.0.1:31840 \
     -L 31841:127.0.0.1:31841 \
+    -L 31842:127.0.0.1:31842 \
     "$remote_host"