Disable chromoting service on permanent errors.

remoting/host/chromoting_host.h

Index: remoting/host/chromoting_host.h
diff --git a/remoting/host/chromoting_host.h b/remoting/host/chromoting_host.h
index a6b18115d819ae952974dee190099517a76b4fb4..8baee1ed357232578d92f034fc545bdc6fa992b7 100644
--- a/remoting/host/chromoting_host.h
+++ b/remoting/host/chromoting_host.h
@@ -17,6 +17,7 @@
 #include "base/threading/thread.h"
 #include "net/base/backoff_entry.h"
 #include "remoting/host/client_session.h"
+#include "remoting/host/host_exit_codes.h"
 #include "remoting/host/host_extension.h"
 #include "remoting/host/host_status_monitor.h"
 #include "remoting/host/host_status_observer.h"
@@ -88,6 +89,7 @@ class ChromotingHost : public base::NonThreadSafe,
   //
   // This method can only be called once during the lifetime of this object.
   void Start(const std::string& host_owner);
+  void SetExitCode(HostExitCodes exit_code);
 
   // HostStatusMonitor interface.
   void AddStatusObserver(HostStatusObserver* observer) override;
@@ -192,6 +194,7 @@ class ChromotingHost : public base::NonThreadSafe,
 
   // True if the host has been started.
   bool started_;
+  HostExitCodes exit_code_;
 
   // Configuration of the protocol.
   scoped_ptr<protocol::CandidateSessionConfig> protocol_config_;