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 "base/compiler_specific.h"
+#include "base/synchronization/waitable_event.h"
+#include "remoting/host/plugin/policy_hack/nat_policy.h"
+
+namespace remoting {
+namespace policy_hack {
+
+class NatPolicyMac : public NatPolicy {
+ public:
+  NatPolicyMac(const NatPolicy::NatEnabledCallback& nat_enabled_cb)
+    : nat_enabled_cb_(nat_enabled_cb) {
+  }
+
+  virtual ~NatPolicyMac() {
+  }
+
+  virtual void StartWatching() OVERRIDE {
+    nat_enabled_cb_.Run(false);
+  }
+
+  virtual void StopWatching(base::WaitableEvent* done) OVERRIDE {
+    done->Signal();
+  }
+
+ private:
+  NatEnabledCallback nat_enabled_cb_;
+};
+
+NatPolicy* NatPolicy::Create(MessageLoop* message_loop,
+                             const NatEnabledCallback& nat_enabled_cb) {
+  return new NatPolicyMac(nat_enabled_cb);
+}
+
+}  // namespace policy_hack
+}  // namespace remoting