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

mash/login/login.cc

Index: mash/login/login.cc
diff --git a/mash/login/login.cc b/mash/login/login.cc
index 190dc15a23d62b8155a26138e93b57f59c56c47f..6bb0c19225f578923246bdff16e3b991296999d4 100644
--- a/mash/login/login.cc
+++ b/mash/login/login.cc
@@ -166,7 +166,7 @@ class Login : public shell::Service,
   }
 
   // shell::InterfaceFactory<mojom::Login>:
-  void Create(shell::Connection* connection,
+  void Create(const shell::Identity& remote_identity,
               mojom::LoginRequest request) override {
     bindings_.AddBinding(this, std::move(request));
   }