Cast: Fix udp_transport_unittest

media/cast/test/utility/net_utility.h

+// Copyright 2014 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.
+
+#include "net/base/ip_endpoint.h"
+
+namespace media {
+namespace cast {
+namespace test {
+
+// Determine a unused UDP port for the in-process receiver to listen on.
+// Method: Bind a UDP socket on port 0, and then check which port the
+// operating system assigned to it.
+net::IPEndPoint GetFreeLocalPort();
+
+}  // namespace test
+}  // namespace cast
+}  // namespace media