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

chrome/browser/extensions/app_data_migrator.h

Index: chrome/browser/extensions/app_data_migrator.h
diff --git a/chrome/browser/extensions/app_data_migrator.h b/chrome/browser/extensions/app_data_migrator.h
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+// Copyright 2015 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_APP_DATA_MIGRATOR_H_
+#define CHROME_BROWSER_EXTENSIONS_APP_DATA_MIGRATOR_H_
+
+#include "base/callback_forward.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+
+class Profile;
+
+namespace extensions {
+class Extension;
+class ExtensionRegistry;
+
+// This class migrates legacy packaged app data in the general storage
+// partition to an isolated storage partition. This happens when a legacy
+// packaged app is upgraded to a platform app. See http://crbug.com/302577
+class AppDataMigrator {
+ public:
+  AppDataMigrator(Profile* profile, ExtensionRegistry* registry);
+  ~AppDataMigrator();
+
+  static bool NeedsMigration(const Extension* old, const Extension* extension);
+
+  void DoMigrationAndReply(const Extension* old,
+                           const Extension* extension,
+                           const base::Closure& reply);
+
+ private:
+  Profile* profile_;
+  ExtensionRegistry* registry_;
+  base::WeakPtrFactory<AppDataMigrator> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppDataMigrator);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_APP_DATA_MIGRATOR_H_