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

mojo/services/ui/views/interfaces/view_manager.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.
 
 [DartPackage="mojo_services"]
 module mojo.ui;
 
 import "mojo/services/ui/views/interfaces/views.mojom";
 import "mojo/services/ui/views/interfaces/view_trees.mojom";
 
 // The view manager is a service which manages trees of views.
 //
 // Before a view can be added to the view tree, it must first be registered
 // with the view manager.  Once registered, the view receives a token as a
 // transferable reference to be provided to the view's intended container.
+[ServiceName="mojo::ui::ViewManager"]
 interface ViewManager {
   // Registers a view with the view manager.
   //
   // When a view is registered, it receives its own host and a token
   // to identify it.
   //
   // The |view_host| is used to configure the view and interact with its
   // local environment.  The view host is private to the view and should
   // not be shared with anyone else.
   //
@@ skipping 14 matching lines @@
   //
   // The |view_tree_host| is used to configure the view tree and interact
   // with the views it contains.  The view tree host is private to the view
   // and should not be shared with anyone else.
   //
   // To unregister the view tree simply close the |view_tree| and/or
   // |view_tree_host| message pipes.
   RegisterViewTree(mojo.ui.ViewTree view_tree,
                    mojo.ui.ViewTreeHost& view_tree_host) => ();
 };