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- // Copyright 2019 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 "components/guest_os/guest_os_prefs.h"
- #include "components/prefs/pref_registry_simple.h"
- namespace guest_os {
- namespace prefs {
- // The following prefs (nested under a provided location, e.g. arc.metrics)
- // persist engagement time across sessions, to be accumulated and sent to UMA
- // once a day.
- // Total engagement time of the device.
- const char kEngagementTimeTotal[] = ".engagement_time.total";
- // Time spent with a matched window in the foreground.
- const char kEngagementTimeForeground[] = ".engagement_time.foreground";
- // Time spent without a matched window in the foreground but the guest OS
- // otherwise running in the background.
- const char kEngagementTimeBackground[] = ".engagement_time.background";
- // The OS version when engagement prefs were recorded. Old results will be
- // discarded if a version change is detected.
- const char kEngagementTimeOsVersion[] = ".engagement_time.os_version";
- // The day ID (number of days since origin of Time) when engagement time was
- // last recorded.
- const char kEngagementTimeDayId[] = ".engagement_time.day_id";
- void RegisterEngagementProfilePrefs(PrefRegistrySimple* registry,
- const std::string& pref_prefix) {
- registry->RegisterTimeDeltaPref(pref_prefix + kEngagementTimeBackground,
- base::TimeDelta());
- registry->RegisterIntegerPref(pref_prefix + kEngagementTimeDayId, 0);
- registry->RegisterTimeDeltaPref(pref_prefix + kEngagementTimeForeground,
- base::TimeDelta());
- registry->RegisterStringPref(pref_prefix + kEngagementTimeOsVersion, "");
- registry->RegisterTimeDeltaPref(pref_prefix + kEngagementTimeTotal,
- base::TimeDelta());
- }
- } // namespace prefs
- } // namespace guest_os
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