Improve handling of invalid command line in Me2Me host.

remoting/host/win/host_service.cc

 // Copyright (c) 2012 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.
 //
 // This file implements the Windows service controlling Me2Me host processes
 // running within user sessions.
 
 #include "remoting/host/win/host_service.h"
 
 #include <windows.h>
@@ skipping 416 matching lines @@
   self->RunAsServiceImpl();
 
   // Release the control handler and notify the main thread that it can exit
   // now.
   self->stopped_event_.Signal();
 }
 
 int DaemonProcessMain() {
   HostService* service = HostService::GetInstance();
   if (!service->InitWithCommandLine(base::CommandLine::ForCurrentProcess())) {
-    return kUsageExitCode;
+    return kInvalidCommandLineExitCode;
   }
 
   return service->Run();
 }
 
 }  // namespace remoting