Remove shell::Connection* parameter to InterfaceFactory<T>::Create()

mash/session/session.cc

Index: mash/session/session.cc
diff --git a/mash/session/session.cc b/mash/session/session.cc
index 26f75d2344b99b78ce5847e3fa59862fcbf52de5..29dac54099e58b3a000aa43176076d508cc41292 100644
--- a/mash/session/session.cc
+++ b/mash/session/session.cc
@@ -85,7 +85,7 @@ void Session::UnlockScreen() {
   StopScreenlock();
 }
 
-void Session::Create(shell::Connection* connection,
+void Session::Create(const shell::Identity& remote_identity,
                      mojom::SessionRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }