Cleanup usage of scoped_ptr<> in remoting for C++11

remoting/host/setup/me2me_native_messaging_host_main.cc

Index: remoting/host/setup/me2me_native_messaging_host_main.cc
diff --git a/remoting/host/setup/me2me_native_messaging_host_main.cc b/remoting/host/setup/me2me_native_messaging_host_main.cc
index a1b973c810c1cb0864e21d77c30ea81bb7888d31..6a97c71d3e7d75e2c54b4dd947804d0a9442bdde 100644
--- a/remoting/host/setup/me2me_native_messaging_host_main.cc
+++ b/remoting/host/setup/me2me_native_messaging_host_main.cc
@@ -232,9 +232,8 @@ int StartMe2MeNativeMessagingHost() {
   if (!delegate->SetRootKeys(privileged.Take(), unprivileged.Take()))
     return kInitializationFailed;
 
-  pairing_registry = new PairingRegistry(
-      io_thread.task_runner(),
-      delegate.PassAs<PairingRegistry::Delegate>());
+  pairing_registry =
+      new PairingRegistry(io_thread.task_runner(), delegate.Pass());
 #else  // defined(OS_WIN)
   pairing_registry =
       CreatePairingRegistry(io_thread.task_runner());