Require an explicit ServiceName annotation for interfaces in C++.

mojo/services/vanadium/security/interfaces/principal.mojom

 // Copyright 2015 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.
 
 module vanadium;
 
 // Represents the name of an application. |url| is the url of the application.
 // |qualifier| is a string that allows to tie a specific instance of an
 // application to another.
 struct AppInstanceName {
@@ skipping 17 matching lines @@
   array<uint8> blessing;
   // TODO(ataly, ukode): Include the name of the identity provider?
   // TODO(ataly, ukode): Include the first and last name of the user?
   // TODO(ataly, ukode): Include any unique ids assigned to the user by the
   // identity provider?
 };
 
 // A service that binds user identities to an application instance running in
 // Mojo. An application instance may have multiple user identities with one of
 // them set as the current identity.
+[ServiceName="vanadium::PrincipalService"]
 interface PrincipalService {
   // Login is called by an application instance (requestor_url/qualifier) that
   // wants to get a new user identity. The service may obtain the user identity
   // through a third-party authentication flow (e.g., oauth2) which may involve
   // user intervention. The obtained identity is added to the set of
   // authenticated user identities of the application instance, and is also set
   // as the current user identity for the application instance.
   //
   // Additionally, the service creates a user blessing that binds the obtained
   // email address of the user to the unique public/private key-pair of the
@@ skipping 18 matching lines @@
   // instance. The provided identity must be present in the set of logged-in
   // user identities for the application instance, otherwise an error is
   // returned.
   SetUser(User user) => (string? error);
 
   // GetLoggedInUsers returns all authenticated user identities of the calling
   // application instance. The user identities are a result of previous Login
   // calls by the application instance.
   GetLoggedInUsers() => (array<User> ids);
 };