New test cases for kiosk app crx file cache.

chrome/browser/chromeos/extensions/external_cache.cc

 // 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.
 
 #include "chrome/browser/chromeos/extensions/external_cache.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/file_util.h"
@@ skipping 102 matching lines @@
     return;
 
   for (size_t i = 0; i < ids.size(); ++i) {
     cached_extensions_->Remove(ids[i], NULL);
     extensions_->Remove(ids[i], NULL);
     local_cache_.RemoveExtension(ids[i]);
   }
   UpdateExtensionLoader();
 }
 
+bool ExternalCache::GetExtension(const std::string& id,
+                                 base::FilePath* file_path,
+                                 std::string* version) {
+  return local_cache_.GetExtension(id, file_path, version);
+}
+
 void ExternalCache::Observe(int type,
                             const content::NotificationSource& source,
                             const content::NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_INSTALL_ERROR: {
       extensions::CrxInstaller* installer =
           content::Source<extensions::CrxInstaller>(source).ptr();
       OnDamagedFileDetected(installer->source_file());
       break;
     }
@@ skipping 180 matching lines @@
     delegate_->OnExtensionLoadedInCache(id);
   UpdateExtensionLoader();
 }
 
 std::string ExternalCache::Delegate::GetInstalledExtensionVersion(
     const std::string& id) {
   return std::string();
 }
 
 }  // namespace chromeos