Framework to allow Chromoting host to respect NAT traversal policy in linux.

remoting/host/plugin/policy_hack/nat_policy_mac.cc

+// Copyright (c) 2011 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 "remoting/host/plugin/policy_hack/nat_policy_mac.h"
+
+#include "base/synchronization/waitable_event.h"
+
+namespace remoting {
+namespace policy_hack {
+
+NatPolicyMac::NatPolicyMac(const NatEnabledCallback& nat_enabled_cb)
+    : nat_enabled_cb_(nat_enabled_cb) {
+}
+
+NatPolicyMac::~NatPolicyMac() {
+}
+
+void NatPolicyMac::StartWatching() {
+  nat_enabled_cb_.Run(false);
+}
+
+void NatPolicyMac::StopWatching(base::WaitableEvent* done) {
+  done->Signal();
+}
+
+NatPolicy* NatPolicy::Create(const NatEnabledCallback& nat_enabled_cb) {
+  return new NatPolicyMac(nat_enabled_cb);
+}
+
+}  // namespace policy_hack
+}  // namespace remoting