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

chrome/browser/chromeos/app_mode/kiosk_app_data.h

Index: chrome/browser/chromeos/app_mode/kiosk_app_data.h
diff --git a/chrome/browser/chromeos/app_mode/kiosk_app_data.h b/chrome/browser/chromeos/app_mode/kiosk_app_data.h
index 4bf061c4ae1e604bcf1b97f157882a98e4626c99..6ef2e6ce8ab75b61b0ebd6e209d6531e6a041f2a 100644
--- a/chrome/browser/chromeos/app_mode/kiosk_app_data.h
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_data.h
@@ -67,6 +67,9 @@ class KioskAppData : public base::SupportsWeakPtr<KioskAppData>,
   // Returns true if web store data fetching is in progress.
   bool IsLoading() const;
 
+  // Returns true if the crx file is going to be downloaded in cache.
+  bool IsCrxCacheLoading() const;

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

This probably should better be part of ExternalCache. Can we use
ExternalCache::IsExtensionPending?

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

Done.

+
   const std::string& app_id() const { return app_id_; }
   const std::string& user_id() const { return user_id_; }
   const std::string& name() const { return name_; }
@@ -75,6 +78,7 @@ class KioskAppData : public base::SupportsWeakPtr<KioskAppData>,
     return raw_icon_.get();
   }
   Status status() const { return status_; }
+  void SetCrxCacheStatus(Status crx_cache_status);
 
  private:
   class IconLoader;
@@ -125,6 +129,7 @@ class KioskAppData : public base::SupportsWeakPtr<KioskAppData>,
 
   KioskAppDataDelegate* delegate_;  // not owned.
   Status status_;
+  Status crx_cache_status_;
 
   std::string app_id_;
   std::string user_id_;