arc: Add splash screen for ARC++ Kiosk startup

chrome/browser/chromeos/login/ui/login_display_host.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 CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/callback_list.h"
 #include "chrome/browser/chromeos/customization/customization_document.h"
 #include "chrome/browser/chromeos/login/oobe_screen.h"
 #include "chrome/browser/chromeos/login/ui/login_display.h"

[Luis Héctor Chávez, 2017/01/24 18:40:24]

nit: remove and fwd-declare AccountId.

[Sergey Poromov, 2017/01/25 14:29:22]

Done.

+#include "components/signin/core/account_id/account_id.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace chromeos {
 
 class AppLaunchController;
 class AutoEnrollmentController;
 class LoginScreenContext;
 class OobeUI;
 class WebUILoginView;
 class WizardController;
@@ skipping 73 matching lines @@
 
   // Starts app launch splash screen. If |is_auto_launch| is true, the app is
   // being auto-launched with no delay.
   virtual void StartAppLaunch(const std::string& app_id,
                               bool diagnostic_mode,
                               bool is_auto_launch) = 0;
 
   // Starts the demo app launch.
   virtual void StartDemoAppLaunch() = 0;
 
+  // Starts ARC kiosk splash screen.
+  virtual void StartArcKiosk(const AccountId& account_id) = 0;
+
  protected:
   // Default LoginDisplayHost. Child class sets the reference.
   static LoginDisplayHost* default_host_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_H_