Refactor kiosk app launch to be part of login screen UI flow.

chrome/browser/chromeos/login/login_display.h

 // Copyright (c) 2012 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_LOGIN_DISPLAY_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_DISPLAY_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 46 matching lines @@
     // Sign in into guest session.
     virtual void LoginAsGuest() = 0;
 
     // Decrypt cryptohome using user provided |old_password|
     // and migrate to new password.
     virtual void MigrateUserData(const std::string& old_password) = 0;
 
     // Sign in into the public account identified by |username|.
     virtual void LoginAsPublicAccount(const std::string& username) = 0;
 
+    // Login to kiosk mode for app with |app_id|.
+    virtual void LoginAsKioskApp(const std::string& app_id) = 0;
+
     // Notify the delegate when the sign-in UI is finished loading.
     virtual void OnSigninScreenReady() = 0;
 
     // Called when existing user pod is selected in the UI.
     virtual void OnUserSelected(const std::string& username) = 0;
 
     // Called when the user requests enterprise enrollment.
     virtual void OnStartEnterpriseEnrollment() = 0;
 
     // Called when the user requests kiosk enable screen.
@@ skipping 114 matching lines @@
   // in redesigned login stack.
   // Login stack (and this object) will be recreated for next user sign in.
   bool is_signin_completed_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginDisplay);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_DISPLAY_H_