Pass the client end handle of the network-to-daemon IPC channel via handle inheritance.

remoting/host/daemon_process_win.cc

Index: remoting/host/daemon_process_win.cc
diff --git a/remoting/host/daemon_process_win.cc b/remoting/host/daemon_process_win.cc
index c29ebb644562729cc56c64c005836448824af3aa..d18c61e16f64b1a33485667219c461c79495e04d 100644
--- a/remoting/host/daemon_process_win.cc
+++ b/remoting/host/daemon_process_win.cc
@@ -29,10 +29,6 @@ namespace {
 const FilePath::CharType kMe2meHostBinaryName[] =
     FILE_PATH_LITERAL("remoting_host.exe");
 
-// The security descriptor of the daemon IPC endpoint. It gives full access
-// to LocalSystem and denies access by anyone else.
-const char kDaemonPipeSecurityDescriptor[] = "O:SYG:SYD:(A;;GA;;;SY)";
-
 } // namespace
 
 namespace remoting {
@@ -90,11 +86,8 @@ void DaemonProcessWin::LaunchNetworkProcess() {
   scoped_ptr<UnprivilegedProcessDelegate> delegate(
       new UnprivilegedProcessDelegate(main_task_runner(), io_task_runner(),
                                       dir_path.Append(kMe2meHostBinaryName)));
-  launcher_.reset(new WorkerProcessLauncher(main_task_runner(),
-                                            io_task_runner(),
-                                            delegate.Pass(),
-                                            this,
-                                            kDaemonPipeSecurityDescriptor));
+  launcher_.reset(new WorkerProcessLauncher(
+      main_task_runner(), delegate.Pass(), this));
 }
 
 void DaemonProcessWin::Send(IPC::Message* message) {