SystemMonitor refactoring: move power state monitor into a separate class called PowerMonitor

base/system_monitor/system_monitor_mac.mm

Index: base/system_monitor/system_monitor_mac.mm
diff --git a/base/system_monitor/system_monitor_mac.mm b/base/system_monitor/system_monitor_mac.mm
deleted file mode 100644
index d0dbaabcd4417864b21166e81c068e20c769cbe6..0000000000000000000000000000000000000000
--- a/base/system_monitor/system_monitor_mac.mm
+++ /dev/null
@@ -1,98 +0,0 @@
-// Copyright (c) 2012 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.
-
-// Implementation based on sample code from
-// http://developer.apple.com/library/mac/#qa/qa1340/_index.html.
-
-#include "base/system_monitor/system_monitor.h"
-
-#include <IOKit/pwr_mgt/IOPMLib.h>
-#include <IOKit/IOMessage.h>
-
-namespace base {
-
-namespace {
-
-io_connect_t g_system_power_io_port = 0;
-IONotificationPortRef g_notification_port_ref = 0;
-io_object_t g_notifier_object = 0;
-
-void SystemPowerEventCallback(void*,
-                              io_service_t service,
-                              natural_t message_type,
-                              void* message_argument) {
-  SystemMonitor* sys_monitor = SystemMonitor::Get();
-  DCHECK(sys_monitor);
-  switch (message_type) {
-    case kIOMessageSystemWillSleep:
-      sys_monitor->ProcessPowerMessage(SystemMonitor::SUSPEND_EVENT);
-      IOAllowPowerChange(g_system_power_io_port,
-          reinterpret_cast<intptr_t>(message_argument));
-      break;
-
-    case kIOMessageSystemWillPowerOn:
-      sys_monitor->ProcessPowerMessage(SystemMonitor::RESUME_EVENT);
-      break;
-  }
-}
-
-}  // namespace
-
-// The reason we can't include this code in the constructor is because
-// PlatformInit() requires an active runloop and the IO port needs to be
-// allocated at sandbox initialization time, before there's a runloop.
-// See crbug.com/83783 .
-
-// static
-void SystemMonitor::AllocateSystemIOPorts() {
-  DCHECK_EQ(g_system_power_io_port, 0u);
-
-  // Notification port allocated by IORegisterForSystemPower.
-
-  g_system_power_io_port = IORegisterForSystemPower(
-      NULL, &g_notification_port_ref, SystemPowerEventCallback,
-      &g_notifier_object);
-
-  DCHECK_NE(g_system_power_io_port, 0u);
-}
-
-void SystemMonitor::PlatformInit() {
-  // Need to call AllocateSystemIOPorts() before constructing a SystemMonitor
-  // object.
-  DCHECK_NE(g_system_power_io_port, 0u);
-  if (g_system_power_io_port == 0)
-    return;
-
-  // Add the notification port to the application runloop
-  CFRunLoopAddSource(
-      CFRunLoopGetCurrent(),
-      IONotificationPortGetRunLoopSource(g_notification_port_ref),
-      kCFRunLoopCommonModes);
-}
-
-void SystemMonitor::PlatformDestroy() {
-  DCHECK_NE(g_system_power_io_port, 0u);
-  if (g_system_power_io_port == 0)
-    return;
-
-  // Remove the sleep notification port from the application runloop
-  CFRunLoopRemoveSource(
-      CFRunLoopGetCurrent(),
-      IONotificationPortGetRunLoopSource(g_notification_port_ref),
-      kCFRunLoopCommonModes);
-
-  // Deregister for system sleep notifications
-  IODeregisterForSystemPower(&g_notifier_object);
-
-  // IORegisterForSystemPower implicitly opens the Root Power Domain IOService,
-  // so we close it here.
-  IOServiceClose(g_system_power_io_port);
-
-  g_system_power_io_port = 0;
-
-  // Destroy the notification port allocated by IORegisterForSystemPower.
-  IONotificationPortDestroy(g_notification_port_ref);
-}
-
-}  // namespace base