Add a instance groups to Connect(), and introduce an Identity struct.

mash/login/login.cc

 // Copyright 2016 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.
 
 #include "mash/login/login.h"
 
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/mus/public/cpp/property_type_converters.h"
@@ skipping 75 matching lines @@
   views::LabelButton* login_button_2_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginView);
 };
 
 }  // namespace
 
 Login::Login() {}
 Login::~Login() {}
 
-void Login::Initialize(mojo::Connector* connector, const std::string& url,
-                       const std::string& user_id, uint32_t id) {
-  tracing_.Initialize(connector, url);
+void Login::Initialize(mojo::Connector* connector,
+                       const mojo::Identity& identity,
+                       uint32_t id) {
+  tracing_.Initialize(connector, identity.name());
 
   aura_init_.reset(new views::AuraInit(connector, "views_mus_resources.pak"));
   views::WindowManagerConnection::Create(connector);
 
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params(
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.delegate = new LoginView(this);
 
   std::map<std::string, std::vector<uint8_t>> properties;
   properties[mash::wm::mojom::kWindowContainer_Property] =
       mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
           static_cast<int32_t>(mash::wm::mojom::Container::LOGIN_WINDOWS));
   mus::Window* window =
       views::WindowManagerConnection::Get()->NewWindow(properties);
   params.native_widget = new views::NativeWidgetMus(
       widget, connector, window, mus::mojom::SurfaceType::DEFAULT);
   widget->Init(params);
   widget->Show();
 }
 
 bool Login::AcceptConnection(mojo::Connection* connection) {
-  if (connection->GetRemoteApplicationName() == "mojo:mash_init") {
+  if (connection->GetRemoteIdentity().name() == "mojo:mash_init") {
     connection->GetInterface(&login_);
     return true;
   }
   return false;
 }
 
 }  // namespace login
 }  // namespace main