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

chrome/browser/chromeos/app_mode/kiosk_app_data.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_DATA_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_DATA_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 49 matching lines @@
 
   // Clears locally cached data.
   void ClearCache();
 
   // Loads app data from the app installed in the given profile.
   void LoadFromInstalledApp(Profile* profile, const extensions::Extension* app);
 
   // 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_; }
   const gfx::ImageSkia& icon() const { return icon_; }
   const base::RefCountedString* raw_icon() const {
     return raw_icon_.get();
   }
   Status status() const { return status_; }
+  void SetCrxCacheStatus(Status crx_cache_status);
 
  private:
   class IconLoader;
   class WebstoreDataParser;
 
   void SetStatus(Status status);
 
   // Returns URLRequestContextGetter to use for fetching web store data.
   net::URLRequestContextGetter* GetRequestContextGetter();
 
@@ skipping 30 matching lines @@
 
   // Helper function for testing for the existence of |key| in
   // |response|. Passes |key|'s content via |value| and returns
   // true when |key| is present.
   bool CheckResponseKeyValue(const base::DictionaryValue* response,
                              const char* key,
                              std::string* value);
 
   KioskAppDataDelegate* delegate_;  // not owned.
   Status status_;
+  Status crx_cache_status_;
 
   std::string app_id_;
   std::string user_id_;
   std::string name_;
   gfx::ImageSkia icon_;
   scoped_refptr<base::RefCountedString> raw_icon_;
 
   scoped_ptr<extensions::WebstoreDataFetcher> webstore_fetcher_;
   base::FilePath icon_path_;
 
   DISALLOW_COPY_AND_ASSIGN(KioskAppData);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_DATA_H_