Download and cache kiosk app extension when it is added via kiosk mamangement ui.

chrome/browser/chromeos/app_mode/kiosk_app_manager.h

 // Copyright 2013 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_KIOSK_APP_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_MANAGER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_data_delegate.h"
+#include "chrome/browser/chromeos/extensions/external_cache.h"
 #include "chrome/browser/chromeos/policy/enterprise_install_attributes.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "ui/gfx/image/image_skia.h"
 
 class PrefRegistrySimple;
 class Profile;
 
 namespace base {
 class RefCountedString;
 }
 
 namespace extensions {
 class Extension;
 }
 
 namespace chromeos {
 
 class KioskAppData;
 class KioskAppManagerObserver;
 
 // KioskAppManager manages cached app data.
-class KioskAppManager : public KioskAppDataDelegate {
+class KioskAppManager : public KioskAppDataDelegate,
+                        public ExternalCache::Delegate {
  public:
   enum ConsumerKioskAutoLaunchStatus {
     // Consumer kiosk mode auto-launch feature can be enabled on this machine.
     CONSUMER_KIOSK_AUTO_LAUNCH_CONFIGURABLE,
     // Consumer kiosk auto-launch feature is enabled on this machine.
     CONSUMER_KIOSK_AUTO_LAUNCH_ENABLED,
     // Consumer kiosk mode auto-launch feature is disabled and cannot any longer
     // be enabled on this machine.
     CONSUMER_KIOSK_AUTO_LAUNCH_DISABLED,
   };
@@ skipping 103 matching lines @@
   friend struct base::DefaultDeleter<KioskAppManager>;
   friend class KioskAppManagerTest;
   friend class KioskTest;
 
   enum AutoLoginState {
     AUTOLOGIN_NONE      = 0,
     AUTOLOGIN_REQUESTED = 1,
     AUTOLOGIN_APPROVED  = 2,
     AUTOLOGIN_REJECTED  = 3,
   };
+  enum KioskAppCrxCacheStatus {

[xiyuan, 2014/05/02 03:22:12]

Seems not used.

[jennyz, 2014/05/02 17:46:55]

woops, forgot to remove. Removed.

+    KIOSK_APP_CACHE_INIT,
+    KIOSK_APP_CACHE_LOADING,
+    KIOSK_APP_CACHE_INSTALLED,
+    KIOSK_APP_CACHE_ERROR,
+  };
 
   KioskAppManager();
   virtual ~KioskAppManager();
 
   // Stop all data loading and remove its dependency on CrosSettings.
   void CleanUp();
 
   // Gets KioskAppData for the given app id.
   const KioskAppData* GetAppData(const std::string& app_id) const;
   KioskAppData* GetAppDataMutable(const std::string& app_id);
 
   // Update app data |apps_| based on CrosSettings.
   void UpdateAppData();
 
   // KioskAppDataDelegate overrides:
   virtual void GetKioskAppIconCacheDir(base::FilePath* cache_dir) OVERRIDE;
   virtual void OnKioskAppDataChanged(const std::string& app_id) OVERRIDE;
   virtual void OnKioskAppDataLoadFailure(const std::string& app_id) OVERRIDE;
 
+  // ExternalCache::Delegate:
+  virtual void OnExtensionListsUpdated(
+      const base::DictionaryValue* prefs) OVERRIDE;
+  virtual void OnExtensionLoadedInCache(const std::string& id) OVERRIDE;
+  virtual void OnExtensionDownloadFailed(
+      const std::string& id,
+      extensions::ExtensionDownloaderDelegate::Error error) OVERRIDE;
+
   // Callback for EnterpriseInstallAttributes::LockDevice() during
   // EnableConsumerModeKiosk() call.
   void OnLockDevice(
       const EnableKioskAutoLaunchCallback& callback,
       policy::EnterpriseInstallAttributes::LockResult result);
 
   // Callback for EnterpriseInstallAttributes::ReadImmutableAttributes() during
   // GetConsumerKioskModeStatus() call.
   void OnReadImmutableAttributes(
       const GetConsumerKioskAutoLaunchStatusCallback& callback);
@@ skipping 11 matching lines @@
   bool ownership_established_;
   ScopedVector<KioskAppData> apps_;
   std::string auto_launch_app_id_;
   ObserverList<KioskAppManagerObserver, true> observers_;
 
   scoped_ptr<CrosSettings::ObserverSubscription>
       local_accounts_subscription_;
   scoped_ptr<CrosSettings::ObserverSubscription>
       local_account_auto_login_id_subscription_;
 
+  base::FilePath cache_dir_;
+  scoped_ptr<ExternalCache> external_cache_;
+
   DISALLOW_COPY_AND_ASSIGN(KioskAppManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_MANAGER_H_