monitor_reconfig: Add script to run for external displays.

run_monitor_reconfigure

Index: run_monitor_reconfigure
diff --git a/run_monitor_reconfigure b/run_monitor_reconfigure
new file mode 100755
index 0000000000000000000000000000000000000000..33a4438d8e2f1dbcf812c7c6b84c584029f4574e
--- /dev/null
+++ b/run_monitor_reconfigure
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+# Copyright (c) 2010 The Chromium OS 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 there's an external display connected, runs the monitor_reconfigure
+# command to choose a screen resolution.
+
+XRANDR=/usr/bin/xrandr
+MONITOR_RECONFIGURE=/usr/bin/monitor_reconfigure
+
+# Always exit with 0
+trap "exit 0" EXIT
+set -e
+
+NUM_OUTPUTS=$($XRANDR | grep -c ' connected')
+if [ "$NUM_OUTPUTS" -gt 1 ]; then
+  $MONITOR_RECONFIGURE
+fi