Migrates legacy packaged app data when it's upgraded to a platform app

chrome/browser/extensions/extension_service.h

 // Copyright (c) 2012 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_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 33 matching lines @@
 class CommandLine;
 class SequencedTaskRunner;
 class Version;
 }
 
 namespace content {
 class DevToolsAgentHost;
 }
 
 namespace extensions {
+class AppDataMigrator;
 class ComponentLoader;
 class CrxInstaller;
 class ExtensionActionStorageManager;
 class ExtensionDownloader;
 class ExtensionDownloaderDelegate;
 class ExtensionErrorController;
 class ExtensionRegistry;
 class ExtensionSystem;
 class ExtensionUpdater;
 class OneShotEvent;
@@ skipping 647 matching lines @@
   scoped_ptr<extensions::ExtensionActionStorageManager>
       extension_action_storage_manager_;
   scoped_ptr<extensions::ManagementPolicy::Provider>
       shared_module_policy_provider_;
 
   // The SharedModuleService used to check for import dependencies.
   scoped_ptr<extensions::SharedModuleService> shared_module_service_;
 
   ObserverList<extensions::UpdateObserver, true> update_observers_;
 
+  scoped_ptr<extensions::AppDataMigrator> app_data_migrator_;

[benwells, 2014/11/06 20:45:35]

Nit: add a comment explaining briefly what it is for (in particular what cases
it is used in).

+
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            DestroyingProfileClearsExtensions);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, SetUnsetBlacklistInPrefs);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            BlacklistedExtensionWillNotInstall);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            UnloadBlacklistedExtensionPolicy);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            WillNotLoadBlacklistedExtensionsFromDirectory);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, ReloadBlacklistedExtension);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, BlacklistedInPrefsFromStartup);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistedExtensionDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistDontEnableManuallyDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistUnknownDontChange);
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_