chromeos: Add power supply info reading capability

chrome/browser/chromeos/chrome_browser_main_chromeos.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/chrome_browser_main_chromeos.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop.h"
 #include "chrome/browser/chromeos/bluetooth/bluetooth_manager.h"
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #include "chrome/browser/chromeos/brightness_observer.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
+#include "chrome/browser/chromeos/cros/power_library.h"
 #include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
 #include "chrome/browser/chromeos/dbus/session_manager_client.h"
 #include "chrome/browser/chromeos/login/session_manager_observer.h"
 #include "chrome/browser/chromeos/net/cros_network_change_notifier_factory.h"
 #include "chrome/browser/chromeos/system/statistics_provider.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/common/main_function_params.h"
 #include "net/base/network_change_notifier.h"
 
@@ skipping 55 matching lines @@
   // We should remove observers attached to D-Bus clients before
   // DBusThreadManager is shut down.
   if (session_manager_observer_.get()) {
     chromeos::DBusThreadManager::Get()->session_manager_client()->
         RemoveObserver(session_manager_observer_.get());
   }
   if (brightness_observer_.get()) {
     chromeos::DBusThreadManager::Get()->power_manager_client()->RemoveObserver(
         brightness_observer_.get());
   }
+  chromeos::PowerManagerClient::Observer* power_lib =
+      chromeos::CrosLibrary::Get()->GetPowerLibrary();
+  chromeos::DBusThreadManager::Get()->power_manager_client()->
+      RemoveObserver(power_lib);
 
   chromeos::DBusThreadManager::Shutdown();
 
   if (!parameters().ui_task && chromeos::CrosLibrary::Get())
     chromeos::CrosLibrary::Shutdown();
 
   // To be precise, logout (browser shutdown) is not yet done, but the
   // remaining work is negligible, hence we say LogoutDone here.
   chromeos::BootTimesLoader::Get()->AddLogoutTimeMarker("LogoutDone",
                                                         false);
@@ skipping 36 matching lines @@
 void ChromeBrowserMainPartsChromeos::PostMainMessageLoopStart() {
   ChromeBrowserMainPartsPosix::PostMainMessageLoopStart();
   MessageLoopForUI* message_loop = MessageLoopForUI::current();
   message_loop->AddObserver(g_message_loop_observer.Pointer());
 
   // Initialize DBusThreadManager for the browser. This must be done after
   // the main message loop is started, as it uses the message loop.
   chromeos::DBusThreadManager::Initialize();
 
   // Initialize the brightness observer so that we'll display an onscreen
-  // indication of brightness changes during login.
+  // indication of brightness changes.
   brightness_observer_.reset(new chromeos::BrightnessObserver());
   chromeos::DBusThreadManager::Get()->power_manager_client()->AddObserver(
       brightness_observer_.get());
+
   // Initialize the session manager observer so that we'll take actions
   // per signals sent from the session manager.
   session_manager_observer_.reset(new chromeos::SessionManagerObserver);
   chromeos::DBusThreadManager::Get()->session_manager_client()->
       AddObserver(session_manager_observer_.get());
 
   // Initialize the Chrome OS bluetooth subsystem
   if (parsed_command_line().HasSwitch(switches::kEnableBluetooth)) {
     chromeos::BluetoothManager::Initialize();
   }
+
+  // Probe for power supply status.
+  chromeos::PowerManagerClient::Observer* power_lib =
+      chromeos::CrosLibrary::Get()->GetPowerLibrary();
+  chromeos::DBusThreadManager::Get()->power_manager_client()->
+      AddObserver(power_lib);
 }