kiosk: Remove all cached CRX when removing a kiosk app.

chrome/browser/extensions/updater/local_extension_cache.h

 // Copyright 2014 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_EXTENSIONS_UPDATER_LOCAL_EXTENSION_CACHE_H_
 #define CHROME_BROWSER_EXTENSIONS_UPDATER_LOCAL_EXTENSION_CACHE_H_
 
 #include <map>
 #include <string>
 
@@ skipping 146 matching lines @@
       const base::FilePath& file_path,
       const std::string& version,
       const PutExtensionCallback& callback);
 
   // Invoked on the UI thread when a new entry has been installed in the cache.
   void OnCacheEntryInstalled(const std::string& id,
                              const CacheItemInfo& info,
                              bool was_error,
                              const PutExtensionCallback& callback);
 
-  // Remove crx file at |file_path| in the cache. This method is invoked via
-  // the |backend_task_runner_|.
-  static void BackendRemoveCacheEntry(const base::FilePath& file_path);
+  // Remove cached crx files(all versions) under |cached_dir| for extension with
+  // |id|. This method is invoked via the |backend_task_runner_|.
+  static void BackendRemoveCacheEntry(const base::FilePath& cache_dir,
+                                      const std::string& id);
 
   // Compare two cache items returns true if first item is older.
   static bool CompareCacheItemsAge(const CacheMap::iterator& lhs,
                                    const CacheMap::iterator& rhs);
 
   // Calculate which files need to be deleted and schedule files deletion.
   void CleanUp();
 
   // Path to the directory where the extension cache is stored.
   base::FilePath cache_dir_;
@@ skipping 19 matching lines @@
 
   // Delay between polling cache status.
   base::TimeDelta cache_status_polling_delay_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalExtensionCache);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_UPDATER_LOCAL_EXTENSION_CACHE_H_