Refactor cros library code into central location and have the UI elements obs...

chrome/browser/chromeos/cros_power_library.cc

+// Copyright (c) 2009 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/cros_power_library.h"
+
+#include "base/string_util.h"
+#include "chrome/browser/chromeos/cros_library.h"
+
+CrosPowerLibrary::CrosPowerLibrary() {
+  if (CrosLibrary::loaded()) {
+    power_status_connection_ = chromeos::MonitorPowerStatus(
+        &PowerStatusChangedHandler, this);
+  }
+}
+
+CrosPowerLibrary::~CrosPowerLibrary() {
+  if (CrosLibrary::loaded())
+    chromeos::DisconnectPowerStatus(power_status_connection_);
+}
+
+// static
+CrosPowerLibrary* CrosPowerLibrary::Get() {
+  return Singleton<CrosPowerLibrary>::get();
+}
+
+// static
+bool CrosPowerLibrary::loaded() {
+  return CrosLibrary::loaded();
+}
+
+void CrosPowerLibrary::AddObserver(Observer* observer) {
+  observers_.AddObserver(observer);
+}
+
+void CrosPowerLibrary::RemoveObserver(Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+bool CrosPowerLibrary::line_power_on() const {
+  return status_.line_power_on;
+}
+
+bool CrosPowerLibrary::battery_fully_charged() const {
+  return status_.line_power_on &&
+      status_.battery_state == chromeos::BATTERY_STATE_FULLY_CHARGED;
+}
+
+double CrosPowerLibrary::battery_percentage() const {
+  return status_.battery_percentage;
+}
+
+base::TimeDelta CrosPowerLibrary::battery_time_to_empty() const {
+  return base::TimeDelta::FromSeconds(status_.battery_time_to_empty);
+}
+
+base::TimeDelta CrosPowerLibrary::battery_time_to_full() const {
+  return base::TimeDelta::FromSeconds(status_.battery_time_to_full);
+}
+
+// static
+void CrosPowerLibrary::PowerStatusChangedHandler(void* object,
+    const chromeos::PowerStatus& status) {
+  CrosPowerLibrary* power = static_cast<CrosPowerLibrary*>(object);
+  DLOG(INFO) << "Power" <<
+                " lpo=" << status.line_power_on <<
+                " sta=" << status.battery_state <<
+                " per=" << status.battery_percentage <<
+                " tte=" << status.battery_time_to_empty <<
+                " ttf=" << status.battery_time_to_full;
+  power->status_ = status;
+  FOR_EACH_OBSERVER(Observer, power->observers_, PowerChanged(power));
+}