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

chrome/browser/chromeos/app_mode/kiosk_app_manager.h

Index: chrome/browser/chromeos/app_mode/kiosk_app_manager.h
diff --git a/chrome/browser/chromeos/app_mode/kiosk_app_manager.h b/chrome/browser/chromeos/app_mode/kiosk_app_manager.h
index 7c1231504a1c95a8a99eafacc382390b14ffc68b..3fec37850ac47be374b67db6b9d8cd71f35521c1 100644
--- a/chrome/browser/chromeos/app_mode/kiosk_app_manager.h
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_manager.h
@@ -15,6 +15,7 @@
 #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"
@@ -36,7 +37,8 @@ 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.
@@ -54,7 +56,7 @@ class KioskAppManager : public KioskAppDataDelegate {
 
   // Struct to hold app info returned from GetApps() call.
   struct App {
-    explicit App(const KioskAppData& data);
+    App(const KioskAppData& data, bool is_extension_pending);
     App();
     ~App();
 
@@ -179,6 +181,14 @@ class KioskAppManager : public KioskAppDataDelegate {
   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(
@@ -210,6 +220,9 @@ class KioskAppManager : public KioskAppDataDelegate {
   scoped_ptr<CrosSettings::ObserverSubscription>
       local_account_auto_login_id_subscription_;
 
+  base::FilePath cache_dir_;

[xiyuan, 2014/05/02 18:33:51]

nit: no need to keep as a member if it is only used during init.

[jennyz, 2014/05/02 21:05:04]

Done.

+  scoped_ptr<ExternalCache> external_cache_;
+
   DISALLOW_COPY_AND_ASSIGN(KioskAppManager);
 };