Eliminate kAshNotifyDisabled and SystemNotification

chrome/browser/chromeos/power/low_battery_observer.cc

-// Copyright (c) 2011 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/power/low_battery_observer.h"
-
-#include "base/utf_string_conversions.h"
-#include "chrome/common/time_format.h"
-#include "grit/generated_resources.h"
-#include "grit/theme_resources.h"
-#include "ui/base/l10n/l10n_util.h"
-
-namespace chromeos {
-
-LowBatteryObserver::LowBatteryObserver(Profile* profile)
-  : notification_(profile, "battery.chromeos",
-                  IDR_NOTIFICATION_LOW_BATTERY,
-                  l10n_util::GetStringUTF16(IDS_LOW_BATTERY_TITLE)),
-    remaining_(0) {}
-
-LowBatteryObserver::~LowBatteryObserver() {
-  Hide();
-}
-
-void LowBatteryObserver::PowerChanged(const PowerSupplyStatus& power_status) {
-  // Notification will show when remaining number of minutes is <= limit_min.
-  const base::TimeDelta limit_min = base::TimeDelta::FromMinutes(15);
-  // Notification will hide when remaining number of minutes is > limit_max.
-  const base::TimeDelta limit_max = base::TimeDelta::FromMinutes(30);
-  // Notification will be forced visible if hidden by user when time remaining
-  // <= critical.
-  const base::TimeDelta critical = base::TimeDelta::FromMinutes(5);
-
-  base::TimeDelta remaining =
-      base::TimeDelta::FromSeconds(power_status.battery_seconds_to_empty);
-
-  // To simplify the logic - we handle the case of calculating the remaining
-  // time as if we were on line power.
-  // remaining time of zero means still calculating, this is denoted by
-  // base::TimeDelta().
-  bool line_power = power_status.line_power_on ||
-                    remaining == base::TimeDelta();
-
-  // The urgent flag is used to re-notify the user if the power level
-  // goes critical. We only want to do this once even if the time remaining
-  // goes back up (so long as it doesn't go above limit_max.
-  bool urgent = !line_power &&
-      (notification_.urgent() || remaining <= critical);
-
-  // This is a simple state machine with two states and three edges:
-  // States: visible_, !visible_
-  // Edges: hide: is visible_ to !visible_ triggered if we transition
-  //          to line_power, we're calculating our time remaining,
-  //          or our time remaining has climbed higher than
-  //          limit_max (either by reduced user an undetected transition
-  //          to/from line_power).
-  //        update: is visible_ to _visible triggered when we didn't hide
-  //          and the minutes remaining changed from what's shown.
-  //        show: is !visible_ to visible_ triggered when we're on battery,
-  //          we know the remaining time, and that time is less than limit.
-
-  if (notification_.visible()) {
-    if (line_power || remaining > limit_max) {
-      Hide();
-    } else if (remaining.InMinutes() != remaining_) {
-      Show(remaining, urgent);
-    }
-  } else {
-    if (!line_power && remaining <= limit_min) {
-      Show(remaining, urgent);
-    }
-  }
-}
-
-void LowBatteryObserver::Show(base::TimeDelta remaining, bool urgent) {
-  notification_.Show(l10n_util::GetStringFUTF16(IDS_LOW_BATTERY_MESSAGE,
-      TimeFormat::TimeRemaining(remaining)), urgent, true);
-  remaining_ = remaining.InMinutes();
-}
-
-void LowBatteryObserver::Hide() {
-  notification_.Hide();
-}
-
-}  // namespace chromeos