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

chrome/browser/extensions/app_data_migrator.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.

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

Nit: "Copyright 2014..."

+// 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"
+
+class Profile;
+
+namespace extensions {
+class Extension;
+class ExtensionRegistry;
+
+class AppDataMigrator {

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

Nit: class level comment please.

+ public:
+  AppDataMigrator(Profile* profile, ExtensionRegistry* registry);
+
+  bool NeedsMigration(const Extension* old, const Extension* extension);
+
+  void DoMigrationAndReply(const Extension* old,
+                           const Extension* extension,
+                           const base::Closure& reply);
+
+ private:
+  ExtensionRegistry* registry_;
+
+  Profile* profile_;

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

DISALLOW_COPY_AND_ASSIGN(AppDataMigrator)

+};
+
+} // namespace extensions

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

Nit: two spaces before "//"

+#endif  // CHROME_BROWSER_EXTENSIONS_APP_DATA_MIGRATOR_H_

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

Nit: blank line here.