text: // Copyright 2013 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/ui/ash/system_tray_delegate_chromeos.h"
  
  #include <algorithm>
  #include <set>
  #include <string>
  #include <vector>
  
  #include "ash/ash_switches.h"
  #include "ash/desktop_background/desktop_background_controller.h"
  #include "ash/metrics/user_metrics_recorder.h"
  #include "ash/session_state_delegate.h"
  #include "ash/session_state_observer.h"
  #include "ash/shell.h"
  #include "ash/shell_delegate.h"
  #include "ash/shell_window_ids.h"
  #include "ash/system/bluetooth/bluetooth_observer.h"
  #include "ash/system/date/clock_observer.h"
  #include "ash/system/drive/drive_observer.h"
  #include "ash/system/ime/ime_observer.h"
  #include "ash/system/logout_button/logout_button_observer.h"
  #include "ash/system/tray/system_tray.h"
  #include "ash/system/tray/system_tray_delegate.h"
  #include "ash/system/tray/system_tray_notifier.h"
  #include "ash/system/tray_accessibility.h"
  #include "ash/system/tray_caps_lock.h"
  #include "ash/system/user/login_status.h"
  #include "ash/system/user/update_observer.h"
  #include "ash/system/user/user_observer.h"
  #include "ash/volume_control_delegate.h"
  #include "ash/wm/lock_state_controller.h"
  #include "base/bind_helpers.h"
  #include "base/callback.h"
  #include "base/command_line.h"
  #include "base/logging.h"
  #include "base/memory/weak_ptr.h"
  #include "base/prefs/pref_service.h"
  #include "base/strings/stringprintf.h"
  #include "base/strings/utf_string_conversions.h"
  #include "base/sys_info.h"
  #include "base/time/time.h"
  #include "chrome/browser/browser_process.h"
  #include "chrome/browser/chrome_notification_types.h"
  #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
  #include "chrome/browser/chromeos/accessibility/magnification_manager.h"
  #include "chrome/browser/chromeos/bluetooth/bluetooth_pairing_dialog.h"
  #include "chrome/browser/chromeos/charger_replace/charger_replacement_dialog.h"
  #include "chrome/browser/chromeos/choose_mobile_network_dialog.h"
  #include "chrome/browser/chromeos/drive/drive_integration_service.h"
  #include "chrome/browser/chromeos/drive/job_list.h"
  #include "chrome/browser/chromeos/enrollment_dialog_view.h"
  #include "chrome/browser/chromeos/events/system_key_event_listener.h"
  #include "chrome/browser/chromeos/input_method/input_method_util.h"
  #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
  #include "chrome/browser/chromeos/login/help_app_launcher.h"
  #include "chrome/browser/chromeos/login/login_display_host.h"
  #include "chrome/browser/chromeos/login/login_display_host_impl.h"
  #include "chrome/browser/chromeos/login/login_wizard.h"
  #include "chrome/browser/chromeos/login/startup_utils.h"
  #include "chrome/browser/chromeos/login/supervised_user_manager.h"
  #include "chrome/browser/chromeos/login/user.h"
  #include "chrome/browser/chromeos/login/user_adding_screen.h"
  #include "chrome/browser/chromeos/login/user_manager.h"
  #include "chrome/browser/chromeos/options/network_config_view.h"
  #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
  #include "chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h"
  #include "chrome/browser/chromeos/profiles/multiprofiles_intro_dialog.h"
  #include "chrome/browser/chromeos/settings/cros_settings.h"
  #include "chrome/browser/chromeos/sim_dialog_delegate.h"
  #include "chrome/browser/drive/drive_service_interface.h"
  #include "chrome/browser/feedback/tracing_manager.h"
  #include "chrome/browser/google/google_util.h"
  #include "chrome/browser/lifetime/application_lifetime.h"
  #include "chrome/browser/profiles/profile_manager.h"
  #include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
  #include "chrome/browser/ui/ash/volume_controller_chromeos.h"
  #include "chrome/browser/ui/browser.h"
  #include "chrome/browser/ui/browser_finder.h"
  #include "chrome/browser/ui/chrome_pages.h"
  #include "chrome/browser/ui/host_desktop.h"
  #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
  #include "chrome/browser/ui/singleton_tabs.h"
  #include "chrome/browser/ui/tabs/tab_strip_model.h"
  #include "chrome/browser/ui/webui/chromeos/charger_replacement_handler.h"
  #include "chrome/browser/ui/webui/chromeos/mobile_setup_dialog.h"
  #include "chrome/browser/upgrade_detector.h"
  #include "chrome/common/pref_names.h"
  #include "chrome/common/url_constants.h"
  #include "chromeos/chromeos_switches.h"
  #include "chromeos/dbus/dbus_thread_manager.h"
  #include "chromeos/dbus/session_manager_client.h"
  #include "chromeos/ime/extension_ime_util.h"
  #include "chromeos/ime/input_method_manager.h"
  #include "chromeos/ime/xkeyboard.h"
  #include "chromeos/login/login_state.h"
  #include "components/policy/core/common/cloud/cloud_policy_store.h"
  #include "content/public/browser/notification_observer.h"
  #include "content/public/browser/notification_service.h"
  #include "content/public/browser/user_metrics.h"
  #include "content/public/browser/web_contents.h"
  #include "device/bluetooth/bluetooth_adapter.h"
  #include "device/bluetooth/bluetooth_adapter_factory.h"
  #include "device/bluetooth/bluetooth_device.h"
  #include "grit/ash_strings.h"
  #include "grit/generated_resources.h"
  #include "grit/locale_settings.h"
  #include "net/base/escape.h"
  #include "third_party/cros_system_api/dbus/service_constants.h"
  #include "ui/base/l10n/l10n_util.h"
  #include "ui/base/l10n/time_format.h"
  
  using drive::DriveIntegrationService;
  using drive::DriveIntegrationServiceFactory;
  
  namespace chromeos {
  
  namespace {
  
  // The minimum session length limit that can be set.
  const int kSessionLengthLimitMinMs = 30 * 1000;  // 30 seconds.
  
  // The maximum session length limit that can be set.
  const int kSessionLengthLimitMaxMs = 24 * 60 * 60 * 1000;  // 24 hours.
  
  const char kDisplaySettingsSubPageName[] = "display";
  const char kDisplayOverscanSettingsSubPageName[] = "displayOverscan";
  
  // The URL for the Google Drive settings page.
  const char kDriveSettingsPageURL[] = "https://drive.google.com";
  
  void ExtractIMEInfo(const input_method::InputMethodDescriptor& ime,
                      const input_method::InputMethodUtil& util,
                      ash::IMEInfo* info) {
    info->id = ime.id();
    info->name = util.GetInputMethodLongName(ime);
    info->medium_name = util.GetInputMethodMediumName(ime);
    info->short_name = util.GetInputMethodShortName(ime);
    info->third_party = extension_ime_util::IsExtensionIME(ime.id());
  }
  
  gfx::NativeWindow GetNativeWindowByStatus(ash::user::LoginStatus login_status,
                                            bool session_started) {
    int container_id =
        (!session_started || login_status == ash::user::LOGGED_IN_NONE ||
         login_status == ash::user::LOGGED_IN_LOCKED) ?
            ash::internal::kShellWindowId_LockSystemModalContainer :
            ash::internal::kShellWindowId_SystemModalContainer;
    return ash::Shell::GetContainer(ash::Shell::GetPrimaryRootWindow(),
                                    container_id);
  }
  
  // Converts drive::JobInfo to ash::DriveOperationStatus.
  // If the job is not of type that ash tray is interested, returns false.
  bool ConvertToDriveOperationStatus(const drive::JobInfo& info,
                                     ash::DriveOperationStatus* status) {
    if (info.job_type == drive::TYPE_DOWNLOAD_FILE) {
      status->type = ash::DriveOperationStatus::OPERATION_DOWNLOAD;
    } else if (info.job_type == drive::TYPE_UPLOAD_NEW_FILE ||
               info.job_type == drive::TYPE_UPLOAD_EXISTING_FILE) {
      status->type = ash::DriveOperationStatus::OPERATION_UPLOAD;
    } else {
      return false;
    }
  
    if (info.state == drive::STATE_NONE)
      status->state = ash::DriveOperationStatus::OPERATION_NOT_STARTED;
    else
      status->state = ash::DriveOperationStatus::OPERATION_IN_PROGRESS;
  
    status->id = info.job_id;
    status->file_path = info.file_path;
    status->progress = info.num_total_bytes == 0 ? 0.0 :
        static_cast<double>(info.num_completed_bytes) /
            static_cast<double>(info.num_total_bytes);
    return true;
  }
  
  // Converts drive::JobInfo that has finished in |error| state
  // to ash::DriveOperationStatus.
  // If the job is not of type that ash tray is interested, returns false.
  bool ConvertToFinishedDriveOperationStatus(const drive::JobInfo& info,
                                             drive::FileError error,
                                             ash::DriveOperationStatus* status) {
    if (!ConvertToDriveOperationStatus(info, status))
      return false;
    status->state = (error == drive::FILE_ERROR_OK)
                        ? ash::DriveOperationStatus::OPERATION_COMPLETED
                        : ash::DriveOperationStatus::OPERATION_FAILED;
    return true;
  }
  
  // Converts a list of drive::JobInfo to a list of ash::DriveOperationStatusList.
  ash::DriveOperationStatusList ConvertToDriveStatusList(
      const std::vector<drive::JobInfo>& list) {
    ash::DriveOperationStatusList results;
    for (size_t i = 0; i < list.size(); ++i) {
      ash::DriveOperationStatus status;
      if (ConvertToDriveOperationStatus(list[i], &status))
        results.push_back(status);
    }
    return results;
  }
  
  void BluetoothPowerFailure() {
    // TODO(sad): Show an error bubble?
  }
  
  void BluetoothSetDiscoveringError() {
    LOG(ERROR) << "BluetoothSetDiscovering failed.";
  }
  
  void BluetoothDeviceConnectError(
      device::BluetoothDevice::ConnectErrorCode error_code) {
    // TODO(sad): Do something?
  }
  
  // Shows the settings sub page in the last active browser. If there is no such
  // browser, creates a new browser with the settings sub page.
  void ShowSettingsSubPageForAppropriateBrowser(const std::string& sub_page,
                                                Profile* profile) {
    chrome::ScopedTabbedBrowserDisplayer displayer(profile,
                                                   chrome::HOST_DESKTOP_TYPE_ASH);
    chrome::ShowSettingsSubPage(displayer.browser(), sub_page);
  }
  
  void ShowNetworkSettingsPage(const std::string& service_path) {
    std::string page = chrome::kInternetOptionsSubPage;
    page += "?servicePath=" + net::EscapeUrlEncodedData(service_path, true);
    content::RecordAction(base::UserMetricsAction("OpenInternetOptionsDialog"));
    ShowSettingsSubPageForAppropriateBrowser(
        page, ProfileManager::GetPrimaryUserProfile());
  }
  
  void OnAcceptMultiprofilesIntro(bool no_show_again) {
    PrefService* prefs = ProfileManager::GetActiveUserProfile()->GetPrefs();
    prefs->SetBoolean(prefs::kMultiProfileNeverShowIntro, no_show_again);
    UserAddingScreen::Get()->Start();
  }
  
  }  // namespace
  
  SystemTrayDelegateChromeOS::SystemTrayDelegateChromeOS()
      : weak_ptr_factory_(this),
        user_profile_(NULL),
        clock_type_(base::GetHourClockType()),
        search_key_mapped_to_(input_method::kSearchKey),
        screen_locked_(false),
        have_session_start_time_(false),
        have_session_length_limit_(false),
        volume_control_delegate_(new VolumeController()),
        device_settings_observer_(CrosSettings::Get()->AddSettingsObserver(
            kSystemUse24HourClock,
            base::Bind(&SystemTrayDelegateChromeOS::UpdateClockType,
                       base::Unretained(this)))) {
    // Register notifications on construction so that events such as
    // PROFILE_CREATED do not get missed if they happen before Initialize().
    registrar_.reset(new content::NotificationRegistrar);
    registrar_->Add(this,
                    chrome::NOTIFICATION_UPGRADE_RECOMMENDED,
                    content::NotificationService::AllSources());
    registrar_->Add(this,
                    chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED,
                    content::NotificationService::AllSources());
    if (GetUserLoginStatus() == ash::user::LOGGED_IN_NONE) {
      registrar_->Add(this,
                      chrome::NOTIFICATION_SESSION_STARTED,
                      content::NotificationService::AllSources());
    }
    registrar_->Add(this,
                    chrome::NOTIFICATION_PROFILE_CREATED,
                    content::NotificationService::AllSources());
    registrar_->Add(this,
                    chrome::NOTIFICATION_PROFILE_DESTROYED,
                    content::NotificationService::AllSources());
    registrar_->Add(
        this,
        chrome::NOTIFICATION_CROS_ACCESSIBILITY_TOGGLE_SCREEN_MAGNIFIER,
        content::NotificationService::AllSources());
    registrar_->Add(
        this,
        chrome::NOTIFICATION_CROS_ACCESSIBILITY_TOGGLE_SPOKEN_FEEDBACK,
        content::NotificationService::AllSources());
    registrar_->Add(
        this,
        chrome::NOTIFICATION_CROS_ACCESSIBILITY_TOGGLE_HIGH_CONTRAST_MODE,
        content::NotificationService::AllSources());
    registrar_->Add(
        this,
        chrome::NOTIFICATION_CROS_ACCESSIBILITY_TOGGLE_VIRTUAL_KEYBOARD,
        content::NotificationService::AllSources());
  }
  
  void SystemTrayDelegateChromeOS::Initialize() {
    DBusThreadManager::Get()->GetSessionManagerClient()->AddObserver(this);
  
    input_method::InputMethodManager::Get()->AddObserver(this);
    UpdateClockType();
  
    if (SystemKeyEventListener::GetInstance())
      SystemKeyEventListener::GetInstance()->AddCapsLockObserver(this);
  
    device::BluetoothAdapterFactory::GetAdapter(
        base::Bind(&SystemTrayDelegateChromeOS::InitializeOnAdapterReady,
                   weak_ptr_factory_.GetWeakPtr()));
  
    ash::Shell::GetInstance()->session_state_delegate()->AddSessionStateObserver(
        this);
  
    if (LoginState::IsInitialized())
      LoginState::Get()->AddObserver(this);
  }
  
  void SystemTrayDelegateChromeOS::Shutdown() {
    device_settings_observer_.reset();
  }
  
  void SystemTrayDelegateChromeOS::InitializeOnAdapterReady(
      scoped_refptr<device::BluetoothAdapter> adapter) {
    bluetooth_adapter_ = adapter;
    CHECK(bluetooth_adapter_.get());
    bluetooth_adapter_->AddObserver(this);
  
    local_state_registrar_.reset(new PrefChangeRegistrar);
    local_state_registrar_->Init(g_browser_process->local_state());
  
    UpdateSessionStartTime();
    UpdateSessionLengthLimit();
  
    local_state_registrar_->Add(
        prefs::kSessionStartTime,
        base::Bind(&SystemTrayDelegateChromeOS::UpdateSessionStartTime,
                   base::Unretained(this)));
    local_state_registrar_->Add(
        prefs::kSessionLengthLimit,
        base::Bind(&SystemTrayDelegateChromeOS::UpdateSessionLengthLimit,
                   base::Unretained(this)));
  
    policy::BrowserPolicyConnectorChromeOS* policy_connector =
        g_browser_process->platform_part()->browser_policy_connector_chromeos();
    policy::DeviceCloudPolicyManagerChromeOS* policy_manager =
        policy_connector->GetDeviceCloudPolicyManager();
    if (policy_manager)
      policy_manager->core()->store()->AddObserver(this);
    UpdateEnterpriseDomain();
  }
  
  SystemTrayDelegateChromeOS::~SystemTrayDelegateChromeOS() {
    // Unregister PrefChangeRegistrars.
    local_state_registrar_.reset();
    user_pref_registrar_.reset();
  
    // Unregister content notifications befure destroying any components.
    registrar_.reset();
  
    DBusThreadManager::Get()->GetSessionManagerClient()->RemoveObserver(this);
    input_method::InputMethodManager::Get()->RemoveObserver(this);
    if (SystemKeyEventListener::GetInstance())
      SystemKeyEventListener::GetInstance()->RemoveCapsLockObserver(this);
    bluetooth_adapter_->RemoveObserver(this);
    ash::Shell::GetInstance()
        ->session_state_delegate()
        ->RemoveSessionStateObserver(this);
    LoginState::Get()->RemoveObserver(this);
  
    // Stop observing Drive operations.
    UnobserveDriveUpdates();
  
    policy::BrowserPolicyConnectorChromeOS* connector =
        g_browser_process->platform_part()->browser_policy_connector_chromeos();
    policy::DeviceCloudPolicyManagerChromeOS* policy_manager =
        connector->GetDeviceCloudPolicyManager();
    if (policy_manager)
      policy_manager->core()->store()->RemoveObserver(this);
  }
  
  // Overridden from ash::SystemTrayDelegate:
  bool SystemTrayDelegateChromeOS::GetTrayVisibilityOnStartup() {
    // In case of OOBE / sign in screen tray will be shown later.
    return LoginState::Get()->IsUserLoggedIn();
  }
  
  ash::user::LoginStatus SystemTrayDelegateChromeOS::GetUserLoginStatus() const {
    // All non-logged in ChromeOS specific LOGGED_IN states map to the same
    // Ash specific LOGGED_IN state.
    if (!LoginState::Get()->IsUserLoggedIn())
      return ash::user::LOGGED_IN_NONE;
  
    if (screen_locked_)
      return ash::user::LOGGED_IN_LOCKED;
  
    LoginState::LoggedInUserType user_type =
        LoginState::Get()->GetLoggedInUserType();
    switch (user_type) {
      case LoginState::LOGGED_IN_USER_NONE:
        return ash::user::LOGGED_IN_NONE;
      case LoginState::LOGGED_IN_USER_REGULAR:
        return ash::user::LOGGED_IN_USER;
      case LoginState::LOGGED_IN_USER_OWNER:
        return ash::user::LOGGED_IN_OWNER;
      case LoginState::LOGGED_IN_USER_GUEST:
        return ash::user::LOGGED_IN_GUEST;
      case LoginState::LOGGED_IN_USER_RETAIL_MODE:
        return ash::user::LOGGED_IN_RETAIL_MODE;
      case LoginState::LOGGED_IN_USER_PUBLIC_ACCOUNT:
        return ash::user::LOGGED_IN_PUBLIC;
      case LoginState::LOGGED_IN_USER_LOCALLY_MANAGED:
        return ash::user::LOGGED_IN_LOCALLY_MANAGED;
      case LoginState::LOGGED_IN_USER_KIOSK_APP:
        return ash::user::LOGGED_IN_KIOSK_APP;
    }
    NOTREACHED();
    return ash::user::LOGGED_IN_NONE;
  }
  
  bool SystemTrayDelegateChromeOS::IsOobeCompleted() const {
    if (!base::SysInfo::IsRunningOnChromeOS() &&
        LoginState::Get()->IsUserLoggedIn())
      return true;
    return StartupUtils::IsOobeCompleted();
  }
  
  void SystemTrayDelegateChromeOS::ChangeProfilePicture() {
    content::RecordAction(
        base::UserMetricsAction("OpenChangeProfilePictureDialog"));
    ShowSettingsSubPageForAppropriateBrowser(
        chrome::kChangeProfilePictureSubPage,
        ProfileManager::GetActiveUserProfile());
  }
  
  const std::string SystemTrayDelegateChromeOS::GetEnterpriseDomain() const {
    return enterprise_domain_;
  }
  
  const base::string16 SystemTrayDelegateChromeOS::GetEnterpriseMessage() const {
    if (GetEnterpriseDomain().empty())
      return base::string16();
    return l10n_util::GetStringFUTF16(IDS_DEVICE_OWNED_BY_NOTICE,
                                      base::UTF8ToUTF16(GetEnterpriseDomain()));
  }
  
  const std::string SystemTrayDelegateChromeOS::GetLocallyManagedUserManager()
      const {
    if (GetUserLoginStatus() != ash::user::LOGGED_IN_LOCALLY_MANAGED)
      return std::string();
    return UserManager::Get()->GetSupervisedUserManager()->GetManagerDisplayEmail(
        chromeos::UserManager::Get()->GetActiveUser()->email());
  }
  
  const base::string16
  SystemTrayDelegateChromeOS::GetLocallyManagedUserManagerName() const {
    if (GetUserLoginStatus() != ash::user::LOGGED_IN_LOCALLY_MANAGED)
      return base::string16();
    return UserManager::Get()->GetSupervisedUserManager()->GetManagerDisplayName(
        chromeos::UserManager::Get()->GetActiveUser()->email());
  }
  
  const base::string16 SystemTrayDelegateChromeOS::GetLocallyManagedUserMessage()
      const {
    if (GetUserLoginStatus() != ash::user::LOGGED_IN_LOCALLY_MANAGED)
      return base::string16();
    return l10n_util::GetStringFUTF16(
        IDS_USER_IS_LOCALLY_MANAGED_BY_NOTICE,
        base::UTF8ToUTF16(GetLocallyManagedUserManager()));
  }
  
  bool SystemTrayDelegateChromeOS::SystemShouldUpgrade() const {
    return UpgradeDetector::GetInstance()->notify_upgrade();
  }
  
  base::HourClockType SystemTrayDelegateChromeOS::GetHourClockType() const {
    return clock_type_;
  }
  
  void SystemTrayDelegateChromeOS::ShowSettings() {
    chrome::ScopedTabbedBrowserDisplayer displayer(
        ProfileManager::GetActiveUserProfile(), chrome::HOST_DESKTOP_TYPE_ASH);
    chrome::ShowSettings(displayer.browser());
  }
  
  bool SystemTrayDelegateChromeOS::ShouldShowSettings() {
    return UserManager::Get()->GetCurrentUserFlow()->ShouldShowSettings();
  }
  
  void SystemTrayDelegateChromeOS::ShowDateSettings() {
    content::RecordAction(base::UserMetricsAction("ShowDateOptions"));
    std::string sub_page =
        std::string(chrome::kSearchSubPage) + "#" +
        l10n_util::GetStringUTF8(IDS_OPTIONS_SETTINGS_SECTION_TITLE_DATETIME);
    // Everybody can change the time zone (even though it is a device setting).
    ShowSettingsSubPageForAppropriateBrowser(
        sub_page, ProfileManager::GetActiveUserProfile());
  }
  
  void SystemTrayDelegateChromeOS::ShowNetworkSettings(
      const std::string& service_path) {
    if (!LoginState::Get()->IsUserLoggedIn())
      return;
    ShowNetworkSettingsPage(service_path);
  }
  
  void SystemTrayDelegateChromeOS::ShowBluetoothSettings() {
    // TODO(sad): Make this work.
  }
  
  void SystemTrayDelegateChromeOS::ShowDisplaySettings() {
    content::RecordAction(base::UserMetricsAction("ShowDisplayOptions"));
    ShowSettingsSubPageForAppropriateBrowser(
        kDisplaySettingsSubPageName, ProfileManager::GetActiveUserProfile());
  }
  
  void SystemTrayDelegateChromeOS::ShowChromeSlow() {
    chrome::ScopedTabbedBrowserDisplayer displayer(
        ProfileManager::GetPrimaryUserProfile(), chrome::HOST_DESKTOP_TYPE_ASH);
    chrome::ShowSlow(displayer.browser());
  }
  
  bool SystemTrayDelegateChromeOS::ShouldShowDisplayNotification() {
    // Packaged app is not counted as 'last active', so if a browser opening the
    // display settings is in background of a packaged app, it will return true.
    // TODO(mukai): fix this.
    Browser* active_browser =
        chrome::FindLastActiveWithHostDesktopType(chrome::HOST_DESKTOP_TYPE_ASH);
    if (!active_browser)
      return true;
  
    content::WebContents* active_contents =
        active_browser->tab_strip_model()->GetActiveWebContents();
    if (!active_contents)
      return true;
  
    GURL visible_url = active_contents->GetLastCommittedURL();
    std::string display_settings_url =
        std::string(chrome::kChromeUISettingsURL) + kDisplaySettingsSubPageName;
    std::string display_overscan_url = std::string(chrome::kChromeUISettingsURL) +
                                       kDisplayOverscanSettingsSubPageName;
    return (visible_url.spec() != display_settings_url) &&
           (visible_url.spec() != display_overscan_url);
  }
  
  void SystemTrayDelegateChromeOS::ShowDriveSettings() {
    // TODO(tengs): Open the drive-specific settings page once we put it in.
    // For now just show Google Drive main page.
    chrome::ScopedTabbedBrowserDisplayer displayer(
        ProfileManager::GetActiveUserProfile(), chrome::HOST_DESKTOP_TYPE_ASH);
    chrome::ShowSingletonTabOverwritingNTP(
        displayer.browser(),
        chrome::GetSingletonTabNavigateParams(displayer.browser(),
                                              GURL(kDriveSettingsPageURL)));
  }
  
  void SystemTrayDelegateChromeOS::ShowIMESettings() {
    content::RecordAction(base::UserMetricsAction("OpenLanguageOptionsDialog"));
    ShowSettingsSubPageForAppropriateBrowser(
        chrome::kLanguageOptionsSubPage, ProfileManager::GetActiveUserProfile());
  }
  
  void SystemTrayDelegateChromeOS::ShowHelp() {
    chrome::ShowHelpForProfile(ProfileManager::GetActiveUserProfile(),
                               chrome::HOST_DESKTOP_TYPE_ASH,
                               chrome::HELP_SOURCE_MENU);
  }
  
  void SystemTrayDelegateChromeOS::ShowAccessibilityHelp() {
    chrome::ScopedTabbedBrowserDisplayer displayer(
        ProfileManager::GetActiveUserProfile(), chrome::HOST_DESKTOP_TYPE_ASH);
    accessibility::ShowAccessibilityHelp(displayer.browser());
  }
  
  void SystemTrayDelegateChromeOS::ShowAccessibilitySettings() {
    content::RecordAction(base::UserMetricsAction("ShowAccessibilitySettings"));
    std::string sub_page = std::string(chrome::kSearchSubPage) + "#" +
                           l10n_util::GetStringUTF8(
                               IDS_OPTIONS_SETTINGS_SECTION_TITLE_ACCESSIBILITY);
    ShowSettingsSubPageForAppropriateBrowser(
        sub_page, ProfileManager::GetActiveUserProfile());
  }
  
  void SystemTrayDelegateChromeOS::ShowPublicAccountInfo() {
    chrome::ScopedTabbedBrowserDisplayer displayer(
        ProfileManager::GetActiveUserProfile(), chrome::HOST_DESKTOP_TYPE_ASH);
    chrome::ShowPolicy(displayer.browser());
  }
  
  void SystemTrayDelegateChromeOS::ShowLocallyManagedUserInfo() {
    // TODO(antrim): find out what should we show in this case.
    // http://crbug.com/229762
  }
  
  void SystemTrayDelegateChromeOS::ShowEnterpriseInfo() {
    ash::user::LoginStatus status = GetUserLoginStatus();
    if (status == ash::user::LOGGED_IN_NONE ||
        status == ash::user::LOGGED_IN_LOCKED) {
      scoped_refptr<chromeos::HelpAppLauncher> help_app(
          new chromeos::HelpAppLauncher(GetNativeWindow()));
      help_app->ShowHelpTopic(chromeos::HelpAppLauncher::HELP_ENTERPRISE);
    } else {
      GURL url(google_util::StringAppendGoogleLocaleParam(
          chrome::kLearnMoreEnterpriseURL));
      chrome::ScopedTabbedBrowserDisplayer displayer(
          ProfileManager::GetActiveUserProfile(), chrome::HOST_DESKTOP_TYPE_ASH);
      chrome::ShowSingletonTab(displayer.browser(), url);
    }
  }
  
  void SystemTrayDelegateChromeOS::ShowUserLogin() {
    ash::Shell* shell = ash::Shell::GetInstance();
    if (!shell->delegate()->IsMultiProfilesEnabled())
      return;
  
    // Only regular users could add other users to current session.
    if (UserManager::Get()->GetActiveUser()->GetType() !=
        User::USER_TYPE_REGULAR) {
      return;
    }
  
    if (static_cast<int>(UserManager::Get()->GetLoggedInUsers().size()) >=
        shell->session_state_delegate()->GetMaximumNumberOfLoggedInUsers())
      return;
  
    // Launch sign in screen to add another user to current session.
    if (UserManager::Get()->GetUsersAdmittedForMultiProfile().size()) {
      // Don't show dialog if any logged in user in multi-profiles session
      // dismissed it.
      bool show_intro = true;
      const UserList logged_in_users = UserManager::Get()->GetLoggedInUsers();
      for (UserList::const_iterator it = logged_in_users.begin();
           it != logged_in_users.end();
           ++it) {
        show_intro &= !multi_user_util::GetProfileFromUserID(
                           multi_user_util::GetUserIDFromEmail((*it)->email()))
                           ->GetPrefs()
                           ->GetBoolean(prefs::kMultiProfileNeverShowIntro);
        if (!show_intro)
          break;
      }
      if (show_intro) {
        base::Callback<void(bool)> on_accept =
            base::Bind(&OnAcceptMultiprofilesIntro);
        ShowMultiprofilesIntroDialog(on_accept);
      } else {
        UserAddingScreen::Get()->Start();
      }
    }
  }
  
  bool SystemTrayDelegateChromeOS::ShowSpringChargerReplacementDialog() {
    if (!ChargerReplacementDialog::ShouldShowDialog())
      return false;
  
    ChargerReplacementDialog* dialog =
        new ChargerReplacementDialog(GetNativeWindow());
    dialog->Show();
    return true;
  }
  
  bool SystemTrayDelegateChromeOS::IsSpringChargerReplacementDialogVisible() {
    return ChargerReplacementDialog::IsDialogVisible();
  }
  
  bool SystemTrayDelegateChromeOS::HasUserConfirmedSafeSpringCharger() {
    return ChargerReplacementHandler::GetChargerStatusPref() ==
           ChargerReplacementHandler::CONFIRM_SAFE_CHARGER;
  }
  
  void SystemTrayDelegateChromeOS::ShutDown() {
    ash::Shell::GetInstance()->lock_state_controller()->RequestShutdown();
  }
  
  void SystemTrayDelegateChromeOS::SignOut() {
    chrome::AttemptUserExit();
  }
  
  void SystemTrayDelegateChromeOS::RequestLockScreen() {
    // TODO(antrim) : additional logging for crbug/173178
    LOG(WARNING) << "Requesting screen lock from AshSystemTrayDelegate";
    DBusThreadManager::Get()->GetSessionManagerClient()->RequestLockScreen();
  }
  
  void SystemTrayDelegateChromeOS::RequestRestartForUpdate() {
    // We expect that UpdateEngine is in "Reboot for update" state now.
    chrome::NotifyAndTerminate(true /* fast path */);
  }
  
  void SystemTrayDelegateChromeOS::GetAvailableBluetoothDevices(
      ash::BluetoothDeviceList* list) {
    device::BluetoothAdapter::DeviceList devices =
        bluetooth_adapter_->GetDevices();
    for (size_t i = 0; i < devices.size(); ++i) {
      device::BluetoothDevice* device = devices[i];
      ash::BluetoothDeviceInfo info;
      info.address = device->GetAddress();
      info.display_name = device->GetName();
      info.connected = device->IsConnected();
      info.connecting = device->IsConnecting();
      info.paired = device->IsPaired();
      list->push_back(info);
    }
  }
  
  void SystemTrayDelegateChromeOS::BluetoothStartDiscovering() {
    bluetooth_adapter_->StartDiscovering(
        base::Bind(&base::DoNothing), base::Bind(&BluetoothSetDiscoveringError));
  }
  
  void SystemTrayDelegateChromeOS::BluetoothStopDiscovering() {
    bluetooth_adapter_->StopDiscovering(
        base::Bind(&base::DoNothing), base::Bind(&BluetoothSetDiscoveringError));
  }
  
  void SystemTrayDelegateChromeOS::ConnectToBluetoothDevice(
      const std::string& address) {
    device::BluetoothDevice* device = bluetooth_adapter_->GetDevice(address);
    if (!device || device->IsConnecting() ||
        (device->IsConnected() && device->IsPaired())) {
      return;
    }
    if (device->IsPaired() && !device->IsConnectable())
      return;
    if (device->IsPaired() || !device->IsPairable()) {
      ash::Shell::GetInstance()->metrics()->RecordUserMetricsAction(
          ash::UMA_STATUS_AREA_BLUETOOTH_CONNECT_KNOWN_DEVICE);
      device->Connect(NULL,
                      base::Bind(&base::DoNothing),
                      base::Bind(&BluetoothDeviceConnectError));
    } else {  // Show paring dialog for the unpaired device.
      ash::Shell::GetInstance()->metrics()->RecordUserMetricsAction(
          ash::UMA_STATUS_AREA_BLUETOOTH_CONNECT_UNKNOWN_DEVICE);
      BluetoothPairingDialog* dialog =
          new BluetoothPairingDialog(GetNativeWindow(), device);
      // The dialog deletes itself on close.
      dialog->Show();
    }
  }
  
  bool SystemTrayDelegateChromeOS::IsBluetoothDiscovering() {
    return bluetooth_adapter_->IsDiscovering();
  }
  
  void SystemTrayDelegateChromeOS::GetCurrentIME(ash::IMEInfo* info) {
    input_method::InputMethodManager* manager =
        input_method::InputMethodManager::Get();
    input_method::InputMethodUtil* util = manager->GetInputMethodUtil();
    input_method::InputMethodDescriptor ime = manager->GetCurrentInputMethod();
    ExtractIMEInfo(ime, *util, info);
    info->selected = true;
  }
  
  void SystemTrayDelegateChromeOS::GetAvailableIMEList(ash::IMEInfoList* list) {
    input_method::InputMethodManager* manager =
        input_method::InputMethodManager::Get();
    input_method::InputMethodUtil* util = manager->GetInputMethodUtil();
    scoped_ptr<input_method::InputMethodDescriptors> ime_descriptors(
        manager->GetActiveInputMethods());
    std::string current = manager->GetCurrentInputMethod().id();
    for (size_t i = 0; i < ime_descriptors->size(); i++) {
      input_method::InputMethodDescriptor& ime = ime_descriptors->at(i);
      ash::IMEInfo info;
      ExtractIMEInfo(ime, *util, &info);
      info.selected = ime.id() == current;
      list->push_back(info);
    }
  }
  
  void SystemTrayDelegateChromeOS::GetCurrentIMEProperties(
      ash::IMEPropertyInfoList* list) {
    input_method::InputMethodManager* manager =
        input_method::InputMethodManager::Get();
    input_method::InputMethodPropertyList properties =
        manager->GetCurrentInputMethodProperties();
    for (size_t i = 0; i < properties.size(); ++i) {
      ash::IMEPropertyInfo property;
      property.key = properties[i].key;
      property.name = base::UTF8ToUTF16(properties[i].label);
      property.selected = properties[i].is_selection_item_checked;
      list->push_back(property);
    }
  }
  
  void SystemTrayDelegateChromeOS::SwitchIME(const std::string& ime_id) {
    input_method::InputMethodManager::Get()->ChangeInputMethod(ime_id);
  }
  
  void SystemTrayDelegateChromeOS::ActivateIMEProperty(const std::string& key) {
    input_method::InputMethodManager::Get()->ActivateInputMethodProperty(key);
  }
  
  void SystemTrayDelegateChromeOS::CancelDriveOperation(int32 operation_id) {
    DriveIntegrationService* integration_service = FindDriveIntegrationService();
    if (!integration_service)
      return;
  
    integration_service->job_list()->CancelJob(operation_id);
  }
  
  void SystemTrayDelegateChromeOS::GetDriveOperationStatusList(
      ash::DriveOperationStatusList* list) {
    DriveIntegrationService* integration_service = FindDriveIntegrationService();
    if (!integration_service)
      return;
  
    *list = ConvertToDriveStatusList(
        integration_service->job_list()->GetJobInfoList());
  }
  
  void SystemTrayDelegateChromeOS::ShowNetworkConfigure(
      const std::string& network_id,
      gfx::NativeWindow parent_window) {
    NetworkConfigView::Show(network_id, parent_window);
  }
  
  bool SystemTrayDelegateChromeOS::EnrollNetwork(
      const std::string& network_id,
      gfx::NativeWindow parent_window) {
    return enrollment::CreateDialog(network_id, parent_window);
  }
  
  void SystemTrayDelegateChromeOS::ManageBluetoothDevices() {
    content::RecordAction(base::UserMetricsAction("ShowBluetoothSettingsPage"));
    std::string sub_page =
        std::string(chrome::kSearchSubPage) + "#" +
        l10n_util::GetStringUTF8(IDS_OPTIONS_SETTINGS_SECTION_TITLE_BLUETOOTH);
    ShowSettingsSubPageForAppropriateBrowser(
        sub_page, ProfileManager::GetPrimaryUserProfile());
  }
  
  void SystemTrayDelegateChromeOS::ToggleBluetooth() {
    bluetooth_adapter_->SetPowered(!bluetooth_adapter_->IsPowered(),
                                   base::Bind(&base::DoNothing),
                                   base::Bind(&BluetoothPowerFailure));
  }
  
  void SystemTrayDelegateChromeOS::ShowMobileSimDialog() {
    SimDialogDelegate::ShowDialog(GetNativeWindow(),
                                  SimDialogDelegate::SIM_DIALOG_UNLOCK);
  }
  
  void SystemTrayDelegateChromeOS::ShowMobileSetupDialog(
      const std::string& service_path) {
    MobileSetupDialog::Show(service_path);
  }
  
  void SystemTrayDelegateChromeOS::ShowOtherNetworkDialog(
      const std::string& type) {
    if (type == shill::kTypeCellular) {
      ChooseMobileNetworkDialog::ShowDialog(GetNativeWindow());
      return;
    }
    NetworkConfigView::ShowForType(type, GetNativeWindow());
  }
  
  bool SystemTrayDelegateChromeOS::GetBluetoothAvailable() {
    return bluetooth_adapter_->IsPresent();
  }
  
  bool SystemTrayDelegateChromeOS::GetBluetoothEnabled() {
    return bluetooth_adapter_->IsPowered();
  }
  
  void SystemTrayDelegateChromeOS::ChangeProxySettings() {
    CHECK(GetUserLoginStatus() == ash::user::LOGGED_IN_NONE);
    LoginDisplayHostImpl::default_host()->OpenProxySettings();
  }
  
  ash::VolumeControlDelegate*
  SystemTrayDelegateChromeOS::GetVolumeControlDelegate() const {
    return volume_control_delegate_.get();
  }
  
  void SystemTrayDelegateChromeOS::SetVolumeControlDelegate(
      scoped_ptr<ash::VolumeControlDelegate> delegate) {
    volume_control_delegate_.swap(delegate);
  }
  
  bool SystemTrayDelegateChromeOS::GetSessionStartTime(
      base::TimeTicks* session_start_time) {
    *session_start_time = session_start_time_;
    return have_session_start_time_;
  }
  
  bool SystemTrayDelegateChromeOS::GetSessionLengthLimit(
      base::TimeDelta* session_length_limit) {
    *session_length_limit = session_length_limit_;
    return have_session_length_limit_;
  }
  
  int SystemTrayDelegateChromeOS::GetSystemTrayMenuWidth() {
    return l10n_util::GetLocalizedContentsWidthInPixels(
        IDS_SYSTEM_TRAY_MENU_BUBBLE_WIDTH_PIXELS);
  }
  
  void SystemTrayDelegateChromeOS::ActiveUserWasChanged() {
    GetSystemTrayNotifier()->NotifyUserUpdate();
  }
  
  ash::SystemTray* SystemTrayDelegateChromeOS::GetPrimarySystemTray() {
    return ash::Shell::GetInstance()->GetPrimarySystemTray();
  }
  
  ash::SystemTrayNotifier* SystemTrayDelegateChromeOS::GetSystemTrayNotifier() {
    return ash::Shell::GetInstance()->system_tray_notifier();
  }
  
  void SystemTrayDelegateChromeOS::SetProfile(Profile* profile) {
    // Stop observing the current |user_profile_| on Drive integration status.
    UnobserveDriveUpdates();
  
    user_profile_ = profile;
  
    // Restart observation, now for the newly set |profile|.
    ObserveDriveUpdates();
  
    PrefService* prefs = profile->GetPrefs();
    user_pref_registrar_.reset(new PrefChangeRegistrar);
    user_pref_registrar_->Init(prefs);
    user_pref_registrar_->Add(
        prefs::kUse24HourClock,
        base::Bind(&SystemTrayDelegateChromeOS::UpdateClockType,
                   base::Unretained(this)));
    user_pref_registrar_->Add(
        prefs::kLanguageRemapSearchKeyTo,
        base::Bind(&SystemTrayDelegateChromeOS::OnLanguageRemapSearchKeyToChanged,
                   base::Unretained(this)));
    user_pref_registrar_->Add(
        prefs::kShowLogoutButtonInTray,
        base::Bind(&SystemTrayDelegateChromeOS::UpdateShowLogoutButtonInTray,
                   base::Unretained(this)));
    user_pref_registrar_->Add(
        prefs::kLogoutDialogDurationMs,
        base::Bind(&SystemTrayDelegateChromeOS::UpdateLogoutDialogDuration,
                   base::Unretained(this)));
    user_pref_registrar_->Add(
        prefs::kLargeCursorEnabled,
        base::Bind(&SystemTrayDelegateChromeOS::OnAccessibilityModeChanged,
                   base::Unretained(this),
                   ash::A11Y_NOTIFICATION_NONE));
    user_pref_registrar_->Add(
        prefs::kAutoclickEnabled,
        base::Bind(&SystemTrayDelegateChromeOS::OnAccessibilityModeChanged,
                   base::Unretained(this),
                   ash::A11Y_NOTIFICATION_NONE));
    user_pref_registrar_->Add(
        prefs::kShouldAlwaysShowAccessibilityMenu,
        base::Bind(&SystemTrayDelegateChromeOS::OnAccessibilityModeChanged,
                   base::Unretained(this),
                   ash::A11Y_NOTIFICATION_NONE));
    user_pref_registrar_->Add(
        prefs::kPerformanceTracingEnabled,
        base::Bind(&SystemTrayDelegateChromeOS::UpdatePerformanceTracing,
                   base::Unretained(this)));
  
    UpdateClockType();
    UpdateShowLogoutButtonInTray();
    UpdateLogoutDialogDuration();
    UpdatePerformanceTracing();
    search_key_mapped_to_ =
        profile->GetPrefs()->GetInteger(prefs::kLanguageRemapSearchKeyTo);
  }
  
  bool SystemTrayDelegateChromeOS::UnsetProfile(Profile* profile) {
    if (profile != user_profile_)
      return false;
    user_pref_registrar_.reset();
    return true;
  }
  
  void SystemTrayDelegateChromeOS::ObserveDriveUpdates() {
    DriveIntegrationService* integration_service = FindDriveIntegrationService();
    if (integration_service)
      integration_service->job_list()->AddObserver(this);
  }
  
  void SystemTrayDelegateChromeOS::UnobserveDriveUpdates() {
    DriveIntegrationService* integration_service = FindDriveIntegrationService();
    if (integration_service)
      integration_service->job_list()->RemoveObserver(this);
  }
  
  bool SystemTrayDelegateChromeOS::GetShouldUse24HourClockForTesting() const {
    return ShouldUse24HourClock();
  }
  
  bool SystemTrayDelegateChromeOS::ShouldUse24HourClock() const {
    // On login screen and in guest mode owner default is used for
    // kUse24HourClock preference.
    const ash::user::LoginStatus status = GetUserLoginStatus();
    const CrosSettings* const cros_settings = CrosSettings::Get();
    bool system_use_24_hour_clock = true;
    const bool system_value_found = cros_settings->GetBoolean(
        kSystemUse24HourClock, &system_use_24_hour_clock);
  
    if ((status == ash::user::LOGGED_IN_NONE) || !user_pref_registrar_)
      return (system_value_found
                  ? system_use_24_hour_clock
                  : (base::GetHourClockType() == base::k24HourClock));
  
    const PrefService::Preference* user_pref =
        user_pref_registrar_->prefs()->FindPreference(prefs::kUse24HourClock);
    if (status == ash::user::LOGGED_IN_GUEST && user_pref->IsDefaultValue())
      return (system_value_found
                  ? system_use_24_hour_clock
                  : (base::GetHourClockType() == base::k24HourClock));
  
    bool use_24_hour_clock = true;
    user_pref->GetValue()->GetAsBoolean(&use_24_hour_clock);
    return use_24_hour_clock;
  }
  
  void SystemTrayDelegateChromeOS::UpdateClockType() {
    const bool use_24_hour_clock = ShouldUse24HourClock();
    clock_type_ = use_24_hour_clock ? base::k24HourClock : base::k12HourClock;
    GetSystemTrayNotifier()->NotifyDateFormatChanged();
    // This also works for enterprise-managed devices because they never have
    // local owner.
    if (chromeos::UserManager::Get()->IsCurrentUserOwner())
      CrosSettings::Get()->SetBoolean(kSystemUse24HourClock, use_24_hour_clock);
  }
  
  void SystemTrayDelegateChromeOS::UpdateShowLogoutButtonInTray() {
    GetSystemTrayNotifier()->NotifyShowLoginButtonChanged(
        user_pref_registrar_->prefs()->GetBoolean(
            prefs::kShowLogoutButtonInTray));
  }
  
  void SystemTrayDelegateChromeOS::UpdateLogoutDialogDuration() {
    const int duration_ms =
        user_pref_registrar_->prefs()->GetInteger(prefs::kLogoutDialogDurationMs);
    GetSystemTrayNotifier()->NotifyLogoutDialogDurationChanged(
        base::TimeDelta::FromMilliseconds(duration_ms));
  }
  
  void SystemTrayDelegateChromeOS::UpdateSessionStartTime() {
    const PrefService* local_state = local_state_registrar_->prefs();
    if (local_state->HasPrefPath(prefs::kSessionStartTime)) {
      have_session_start_time_ = true;
      session_start_time_ = base::TimeTicks::FromInternalValue(
          local_state->GetInt64(prefs::kSessionStartTime));
    } else {
      have_session_start_time_ = false;
      session_start_time_ = base::TimeTicks();
    }
    GetSystemTrayNotifier()->NotifySessionStartTimeChanged();
  }
  
  void SystemTrayDelegateChromeOS::UpdateSessionLengthLimit() {
    const PrefService* local_state = local_state_registrar_->prefs();
    if (local_state->HasPrefPath(prefs::kSessionLengthLimit)) {
      have_session_length_limit_ = true;
      session_length_limit_ = base::TimeDelta::FromMilliseconds(
          std::min(std::max(local_state->GetInteger(prefs::kSessionLengthLimit),
                            kSessionLengthLimitMinMs),
                   kSessionLengthLimitMaxMs));
    } else {
      have_session_length_limit_ = false;
      session_length_limit_ = base::TimeDelta();
    }
    GetSystemTrayNotifier()->NotifySessionLengthLimitChanged();
  }
  
  // LoginState::Observer overrides.
  void SystemTrayDelegateChromeOS::LoggedInStateChanged() {
    // It apparently sometimes takes a while after login before the current user
    // is recognized as the owner. Make sure that the system-wide clock setting
    // is updated when the recognition eventually happens
    // (http://crbug.com/278601).
    //
    // Note that it isn't safe to blindly call UpdateClockType() from this
    // method, as LoggedInStateChanged() is also called before the logged-in
    // user's profile has actually been loaded (http://crbug.com/317745). The
    // system tray's time format is updated at login via SetProfile().
    if (chromeos::UserManager::Get()->IsCurrentUserOwner()) {
      CrosSettings::Get()->SetBoolean(kSystemUse24HourClock,
                                      ShouldUse24HourClock());
    }
  }
  
  // Overridden from SessionManagerClient::Observer.
  void SystemTrayDelegateChromeOS::ScreenIsLocked() {
    screen_locked_ = true;
    ash::Shell::GetInstance()->UpdateAfterLoginStatusChange(GetUserLoginStatus());
  }
  
  void SystemTrayDelegateChromeOS::ScreenIsUnlocked() {
    screen_locked_ = false;
    ash::Shell::GetInstance()->UpdateAfterLoginStatusChange(GetUserLoginStatus());
  }
  
  gfx::NativeWindow SystemTrayDelegateChromeOS::GetNativeWindow() const {
    bool session_started = ash::Shell::GetInstance()
                               ->session_state_delegate()
                               ->IsActiveUserSessionStarted();
    return GetNativeWindowByStatus(GetUserLoginStatus(), session_started);
  }
  
  // content::NotificationObserver implementation.
  void SystemTrayDelegateChromeOS::Observe(
      int type,
      const content::NotificationSource& source,
      const content::NotificationDetails& details) {
    switch (type) {
      case chrome::NOTIFICATION_UPGRADE_RECOMMENDED: {
        UpgradeDetector* detector =
            content::Source<UpgradeDetector>(source).ptr();
        ash::UpdateObserver::UpdateSeverity severity =
            ash::UpdateObserver::UPDATE_NORMAL;
        switch (detector->upgrade_notification_stage()) {
          case UpgradeDetector::UPGRADE_ANNOYANCE_SEVERE:
            severity = ash::UpdateObserver::UPDATE_SEVERE_RED;
            break;
  
          case UpgradeDetector::UPGRADE_ANNOYANCE_HIGH:
            severity = ash::UpdateObserver::UPDATE_HIGH_ORANGE;
            break;
  
          case UpgradeDetector::UPGRADE_ANNOYANCE_ELEVATED:
            severity = ash::UpdateObserver::UPDATE_LOW_GREEN;
            break;
  
          case UpgradeDetector::UPGRADE_ANNOYANCE_LOW:
          default:
            severity = ash::UpdateObserver::UPDATE_NORMAL;
            break;
        }
        GetSystemTrayNotifier()->NotifyUpdateRecommended(severity);
        break;
      }
      case chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED: {
        // This notification is also sent on login screen when user avatar
        // is loaded from file.
        if (GetUserLoginStatus() != ash::user::LOGGED_IN_NONE) {
          GetSystemTrayNotifier()->NotifyUserUpdate();
        }
        break;
      }
      case chrome::NOTIFICATION_PROFILE_CREATED: {
        SetProfile(content::Source<Profile>(source).ptr());
        registrar_->Remove(this,
                           chrome::NOTIFICATION_PROFILE_CREATED,
                           content::NotificationService::AllSources());
        break;
      }
      case chrome::NOTIFICATION_PROFILE_DESTROYED: {
        if (UnsetProfile(content::Source<Profile>(source).ptr())) {
          registrar_->Remove(this,
                             chrome::NOTIFICATION_PROFILE_DESTROYED,
                             content::NotificationService::AllSources());
        }
        break;
      }
      case chrome::NOTIFICATION_SESSION_STARTED: {
        ash::Shell::GetInstance()->UpdateAfterLoginStatusChange(
            GetUserLoginStatus());
        SetProfile(ProfileManager::GetActiveUserProfile());
        break;
      }
      case chrome::NOTIFICATION_CROS_ACCESSIBILITY_TOGGLE_SPOKEN_FEEDBACK:
      case chrome::NOTIFICATION_CROS_ACCESSIBILITY_TOGGLE_HIGH_CONTRAST_MODE:
      case chrome::NOTIFICATION_CROS_ACCESSIBILITY_TOGGLE_SCREEN_MAGNIFIER:
      case chrome::NOTIFICATION_CROS_ACCESSIBILITY_TOGGLE_VIRTUAL_KEYBOARD: {
        AccessibilityStatusEventDetails* accessibility_status =
            content::Details<AccessibilityStatusEventDetails>(details).ptr();
        OnAccessibilityModeChanged(accessibility_status->notify);
        break;
      }
      default:
        NOTREACHED();
    }
  }
  
  void SystemTrayDelegateChromeOS::OnLanguageRemapSearchKeyToChanged() {
    search_key_mapped_to_ = user_pref_registrar_->prefs()->GetInteger(
        prefs::kLanguageRemapSearchKeyTo);
  }
  
  void SystemTrayDelegateChromeOS::OnAccessibilityModeChanged(
      ash::AccessibilityNotificationVisibility notify) {
    GetSystemTrayNotifier()->NotifyAccessibilityModeChanged(notify);
  }
  
  void SystemTrayDelegateChromeOS::UpdatePerformanceTracing() {
    if (!user_pref_registrar_)
      return;
    bool value = user_pref_registrar_->prefs()->GetBoolean(
        prefs::kPerformanceTracingEnabled);
    GetSystemTrayNotifier()->NotifyTracingModeChanged(value);
  }
  
  // Overridden from InputMethodManager::Observer.
  void SystemTrayDelegateChromeOS::InputMethodChanged(
      input_method::InputMethodManager* manager,
      bool show_message) {
    // |show_message| in ash means the message_center notifications
    // which should not be shown unless kDisableIMEModeIndicator is
    // on, since the mode indicator already notifies the user.
    if (!CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kDisableIMEModeIndicator)) {
      show_message = false;
    }
    GetSystemTrayNotifier()->NotifyRefreshIME(show_message);
  }
  
  void SystemTrayDelegateChromeOS::InputMethodPropertyChanged(
      input_method::InputMethodManager* manager) {
    GetSystemTrayNotifier()->NotifyRefreshIME(false);
  }
  
  // drive::JobListObserver overrides.
  void SystemTrayDelegateChromeOS::OnJobAdded(const drive::JobInfo& job_info) {
    OnJobUpdated(job_info);
  }
  
  void SystemTrayDelegateChromeOS::OnJobDone(const drive::JobInfo& job_info,
                                             drive::FileError error) {
    ash::DriveOperationStatus status;
    if (ConvertToFinishedDriveOperationStatus(job_info, error, &status))
      GetSystemTrayNotifier()->NotifyDriveJobUpdated(status);
  }
  
  void SystemTrayDelegateChromeOS::OnJobUpdated(const drive::JobInfo& job_info) {
    ash::DriveOperationStatus status;
    if (ConvertToDriveOperationStatus(job_info, &status))
      GetSystemTrayNotifier()->NotifyDriveJobUpdated(status);
  }
  
  DriveIntegrationService*
  SystemTrayDelegateChromeOS::FindDriveIntegrationService() {
    return user_profile_
               ? DriveIntegrationServiceFactory::FindForProfile(user_profile_)
               : NULL;
  }
  
  // Overridden from BluetoothAdapter::Observer.
  void SystemTrayDelegateChromeOS::AdapterPresentChanged(
      device::BluetoothAdapter* adapter,
      bool present) {
    GetSystemTrayNotifier()->NotifyRefreshBluetooth();
  }
  
  void SystemTrayDelegateChromeOS::AdapterPoweredChanged(
      device::BluetoothAdapter* adapter,
      bool powered) {
    GetSystemTrayNotifier()->NotifyRefreshBluetooth();
  }
  
  void SystemTrayDelegateChromeOS::AdapterDiscoveringChanged(
      device::BluetoothAdapter* adapter,
      bool discovering) {
    GetSystemTrayNotifier()->NotifyBluetoothDiscoveringChanged();
  }
  
  void SystemTrayDelegateChromeOS::DeviceAdded(device::BluetoothAdapter* adapter,
                                               device::BluetoothDevice* device) {
    GetSystemTrayNotifier()->NotifyRefreshBluetooth();
  }
  
  void SystemTrayDelegateChromeOS::DeviceChanged(
      device::BluetoothAdapter* adapter,
      device::BluetoothDevice* device) {
    GetSystemTrayNotifier()->NotifyRefreshBluetooth();
  }
  
  void SystemTrayDelegateChromeOS::DeviceRemoved(
      device::BluetoothAdapter* adapter,
      device::BluetoothDevice* device) {
    GetSystemTrayNotifier()->NotifyRefreshBluetooth();
  }
  
  // Overridden from SystemKeyEventListener::CapsLockObserver.
  void SystemTrayDelegateChromeOS::OnCapsLockChange(bool enabled) {
    bool search_mapped_to_caps_lock = false;
    if (!base::SysInfo::IsRunningOnChromeOS() ||
        search_key_mapped_to_ == input_method::kCapsLockKey)
      search_mapped_to_caps_lock = true;
    GetSystemTrayNotifier()->NotifyCapsLockChanged(enabled,
                                                   search_mapped_to_caps_lock);
  }
  
  void SystemTrayDelegateChromeOS::UpdateEnterpriseDomain() {
    policy::BrowserPolicyConnectorChromeOS* connector =
        g_browser_process->platform_part()->browser_policy_connector_chromeos();
    std::string enterprise_domain = connector->GetEnterpriseDomain();
    if (enterprise_domain_ != enterprise_domain) {
      enterprise_domain_ = enterprise_domain;
      GetSystemTrayNotifier()->NotifyEnterpriseDomainChanged();
    }
  }
  
  // Overridden from CloudPolicyStore::Observer
  void SystemTrayDelegateChromeOS::OnStoreLoaded(
      policy::CloudPolicyStore* store) {
    UpdateEnterpriseDomain();
  }
  
  void SystemTrayDelegateChromeOS::OnStoreError(policy::CloudPolicyStore* store) {
    UpdateEnterpriseDomain();
  }
  
  // Overridden from ash::SessionStateObserver
  void SystemTrayDelegateChromeOS::UserAddedToSession(
      const std::string& user_id) {
    GetSystemTrayNotifier()->NotifyUserAddedToSession();
  }
  
  ash::SystemTrayDelegate* CreateSystemTrayDelegate() {
    return new SystemTrayDelegateChromeOS();
  }
  
  }  // namespace chromeos
  