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

remoting/host/plugin/host_script_object.h

Index: remoting/host/plugin/host_script_object.h
diff --git a/remoting/host/plugin/host_script_object.h b/remoting/host/plugin/host_script_object.h
index 03d14c32c32540bb39b95a67ab367cd0bba428af..7624155a1670946077d1070e4969051dd4e9baee 100644
--- a/remoting/host/plugin/host_script_object.h
+++ b/remoting/host/plugin/host_script_object.h
@@ -34,6 +34,10 @@ class RegisterSupportHostRequest;
 class SignalStrategy;
 class SupportAccessVerifier;
 
+namespace policy_hack {
+class NatPolicy;
+}  // namespace policy_hack
+
 // NPAPI plugin implementation for remoting host script object.
 // HostNPScriptObject creates threads that are required to run
 // ChromotingHost and starts/stops the host on those threads. When
@@ -110,11 +114,18 @@ class HostNPScriptObject : public HostStatusObserver {
   void ConnectInternal(const std::string& uid,
                        const std::string& auth_token,
                        const std::string& auth_service);
+  void ReadPolicyAndConnect(const std::string& uid,
+                            const std::string& auth_token,
+                            const std::string& auth_service);
+  void InitNatPolicy();
   void DisconnectInternal();
 
   // Callback for ChromotingHost::Shutdown().
   void OnShutdownFinished();
 
+  // Called when the nat traversal policy is updated.
+  void OnNatPolicyUpdate(bool nat_traversal_enabled);
+
   // Helper function for executing InvokeDefault on an NPObject, and ignoring
   // the return value.
   bool InvokeAndIgnoreResult(NPObject* func,
@@ -151,6 +162,13 @@ class HostNPScriptObject : public HostStatusObserver {
 
   base::WaitableEvent disconnected_event_;
   base::CancellationFlag destructing_;
+
+  // This object must always be created/deleted on the network thread.
+  policy_hack::NatPolicy* nat_policy_;
+
+  bool nat_traversal_enabled_;
+  bool policy_received_;
+  base::Closure pending_connect_;
 };
 
 }  // namespace remoting