New test cases for kiosk app crx file cache.

chrome/browser/chromeos/extensions/external_cache.h

 // Copyright (c) 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_EXTENSIONS_EXTERNAL_CACHE_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTERNAL_CACHE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 102 matching lines @@
 
   // If a user of one of the ExternalCache's extensions detects that
   // the extension is damaged then this method can be used to remove it from
   // the cache and retry to download it after a restart.
   void OnDamagedFileDetected(const base::FilePath& path);
 
   // Removes extensions listed in |ids| from external cache, corresponding crx
   // files will be removed from disk too.
   void RemoveExtensions(const std::vector<std::string>& ids);
 
+  // If extension with |id| exists in the cache, returns |true|, |file_path| and
+  // |version| for the extension. Extension will be marked as used with current
+  // timestamp.
+  bool GetExtension(const std::string& id,
+                    base::FilePath* file_path,
+                    std::string* version);
+
  private:
   // Notifies the that the cache has been updated, providing
   // extensions loader with an updated list of extensions.
   void UpdateExtensionLoader();
 
   // Checks the cache contents and initiate download if needed.
   void CheckCache();
 
   // Invoked on the UI thread when a new entry has been installed in the cache.
   void OnPutExtension(const std::string& id,
@@ skipping 32 matching lines @@
 
   // Weak factory for callbacks.
   base::WeakPtrFactory<ExternalCache> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalCache);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTERNAL_CACHE_H_