M58: arc: Set migration success notification pref.

chrome/browser/chromeos/arc/arc_migration_guide_notification.h

Index: chrome/browser/chromeos/arc/arc_migration_guide_notification.h
diff --git a/chrome/browser/chromeos/arc/arc_migration_guide_notification.h b/chrome/browser/chromeos/arc/arc_migration_guide_notification.h
new file mode 100644
index 0000000000000000000000000000000000000000..40779eb7e913e69e6957d174a64745a0bf71cd65
--- /dev/null
+++ b/chrome/browser/chromeos/arc/arc_migration_guide_notification.h
@@ -0,0 +1,19 @@
+// Copyright 2017 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_CHROMEOS_ARC_ARC_MIGRATION_GUIDE_NOTIFICATION_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_ARC_MIGRATION_GUIDE_NOTIFICATION_H_
+
+class Profile;
+
+namespace arc {
+
+// TODO(kinaba): Will show a one-time notification for successful migration.
+// On M58 it just updates the pref value regarding this behavior, so that
+// the update to M59 is not confused by the unset pref.
+void ShowArcMigrationSuccessNotificationIfNeeded(Profile* profile);
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_MIGRATION_GUIDE_NOTIFICATION_H_