arc: Add Arc Kiosk app service and ability to launch kiosk apps.

chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_APP_MODE_ARC_ARC_KIOSK_APP_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_ARC_ARC_KIOSK_APP_MANAGER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 55 matching lines @@
   // Registers kiosk app entries in local state.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
   // Removes cryptohomes which could not be removed during the previous session.
   static void RemoveObsoleteCryptohomes();
 
   // Returns auto launched account id. If there is none, account is invalid,
   // thus is_valid() returns empty AccountId.
   const AccountId& GetAutoLaunchAccountId() const;
 
+  // Returns app that should be started for given account id.
+  const ArcKioskApp* GetAppByAccountId(const AccountId& account_id);
+
   const ArcKioskApps& GetAllApps() const { return apps_; }
 
   void AddObserver(ArcKioskAppManagerObserver* observer);
   void RemoveObserver(ArcKioskAppManagerObserver* observer);
 
  private:
   // Updates apps_ based on CrosSettings.
   void UpdateApps();
 
   // Removes cryptohomes of the removed apps. Terminates the session if
   // a removed app is running.
   void ClearRemovedApps(const ArcKioskApps& old_apps);
 
   ArcKioskApps apps_;
   AccountId auto_launch_account_id_;
   base::ObserverList<ArcKioskAppManagerObserver, true> observers_;
 
   std::unique_ptr<CrosSettings::ObserverSubscription>
       local_accounts_subscription_;
   std::unique_ptr<CrosSettings::ObserverSubscription>
       local_account_auto_login_id_subscription_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcKioskAppManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_ARC_ARC_KIOSK_APP_MANAGER_H_