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..61df4981199bfaa2a4dfbaa12a1a76487a309f92 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();
 
@@ -78,6 +80,9 @@ class KioskAppManager : public KioskAppDataDelegate {
   // Sub directory under DIR_USER_DATA to store cached icon files.
   static const char kIconCacheDir[];
 
+  // Sub directory under DIR_USER_DATA to store cached crx files.
+  static const char kCrxCacheDir[];
+
   // Gets the KioskAppManager instance, which is lazily created on first call..
   static KioskAppManager* Get();
 
@@ -179,6 +184,14 @@ 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(
@@ -199,6 +212,8 @@ class KioskAppManager : public KioskAppDataDelegate {
   AutoLoginState GetAutoLoginState() const;
   void SetAutoLoginState(AutoLoginState state);
 
+  void GetKioskAppCrxCacheDir(base::FilePath* cache_dir);
+
   // True if machine ownership is already established.
   bool ownership_established_;
   ScopedVector<KioskAppData> apps_;
@@ -210,6 +225,8 @@ class KioskAppManager : public KioskAppDataDelegate {
   scoped_ptr<CrosSettings::ObserverSubscription>
       local_account_auto_login_id_subscription_;
 
+  scoped_ptr<ExternalCache> external_cache_;
+
   DISALLOW_COPY_AND_ASSIGN(KioskAppManager);
 };