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

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 8f760f9560f4db3132d892faca31b33165764fe0..b65a45fe2796ffbc6e61e280f36a4bcf5ae76bba 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -51,6 +51,7 @@ class DevToolsAgentHost;
 }
 
 namespace extensions {
+class AppDataMigrator;
 class ComponentLoader;
 class CrxInstaller;
 class ExtensionActionStorageManager;
@@ -732,6 +733,9 @@ class ExtensionService
 
   ObserverList<extensions::UpdateObserver, true> update_observers_;
 
+  // Migrates app data when upgrading a legacy packaged app to a platform app
+  scoped_ptr<extensions::AppDataMigrator> app_data_migrator_;
+
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            DestroyingProfileClearsExtensions);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, SetUnsetBlacklistInPrefs);