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

chrome/browser/extensions/updater/local_extension_cache.h

Index: chrome/browser/extensions/updater/local_extension_cache.h
diff --git a/chrome/browser/extensions/updater/local_extension_cache.h b/chrome/browser/extensions/updater/local_extension_cache.h
index 63652bab55a371e57e95a3d416e689c47289879e..68f3109ad230ecdaa804348abed723365f51b6c6 100644
--- a/chrome/browser/extensions/updater/local_extension_cache.h
+++ b/chrome/browser/extensions/updater/local_extension_cache.h
@@ -164,9 +164,10 @@ class LocalExtensionCache {
                              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,