M58: arc: Set migration success notification pref.

chrome/browser/chromeos/arc/arc_migration_guide_notification.cc

+// 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.
+
+#include "chrome/browser/chromeos/arc/arc_migration_guide_notification.h"
+
+#include "chrome/browser/chromeos/arc/arc_util.h"
+#include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
+#include "chrome/common/pref_names.h"
+#include "components/signin/core/account_id/account_id.h"
+#include "components/user_manager/known_user.h"
+
+namespace arc {
+
+void ShowArcMigrationSuccessNotificationIfNeeded(Profile* profile) {
+  const AccountId account_id =
+      multi_user_util::GetAccountIdFromProfile(profile);
+
+  int pref_value = kFileSystemIncompatible;
+  user_manager::known_user::GetIntegerPref(
+      account_id, prefs::kArcCompatibleFilesystemChosen, &pref_value);
+
+  // Show notification only when the pref value indicates the file system is
+  // compatible, but not yet notified.
+  if (pref_value != kFileSystemCompatible)
+    return;
+
+  // TODO(kinaba): The acutual notificaiton is added here in M59.
+  // For M58, this function is deployed just for maintaining the pref value.
+
+  // Mark as notified.
+  user_manager::known_user::SetIntegerPref(
+      account_id, prefs::kArcCompatibleFilesystemChosen,
+      arc::kFileSystemCompatibleAndNotified);
+}
+
+}  // namespace arc