Restructure login

mojo/shell/shell.h

 // Copyright 2014 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.
 
 #ifndef MOJO_SHELL_SHELL_H_
 #define MOJO_SHELL_SHELL_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 160 matching lines @@
   Loader* GetLoaderForName(const std::string& name);
 
   void CleanupRunner(NativeRunner* runner);
 
   // Loader management.
   // Loaders are chosen in the order they are listed here.
   NameToLoaderMap name_to_loader_;
   scoped_ptr<Loader> default_loader_;
 
   IdentityToInstanceMap identity_to_instance_;
+  std::set<std::string> singletons_;

[sky, 2016/03/16 15:24:01]

Add a description of this.

 
   IdentityToShellClientFactoryMap shell_client_factories_;
   // Counter used to assign ids to client factories.
   uint32_t shell_client_factory_id_counter_;
 
   InterfacePtrSet<mojom::InstanceListener> instance_listeners_;
 
   base::Callback<void(const Identity&)> instance_quit_callback_;
   scoped_ptr<NativeRunnerFactory> native_runner_factory_;
   std::vector<scoped_ptr<NativeRunner>> native_runners_;
   scoped_ptr<ShellConnection> shell_connection_;
   base::WeakPtrFactory<Shell> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 mojom::Connector::ConnectCallback EmptyConnectCallback();
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_SHELL_H_