Add DeviceDisablingManager to manage device disabling

chrome/browser/chromeos/login/screens/device_disabled_screen.cc

 // Copyright 2014 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/login/screens/device_disabled_screen.h"
 
 #include <string>
 
-#include "base/bind.h"
-#include "base/command_line.h"
 #include "base/logging.h"
-#include "base/prefs/pref_service.h"
-#include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
-#include "chrome/browser/chromeos/login/screens/base_screen_delegate.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
-#include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
-#include "chrome/browser/chromeos/policy/enterprise_install_attributes.h"
-#include "chrome/browser/chromeos/policy/server_backed_device_state.h"
-#include "chrome/common/pref_names.h"
-#include "chromeos/chromeos_switches.h"
-#include "components/policy/core/common/cloud/cloud_policy_constants.h"
+#include "chrome/browser/chromeos/system/device_disabling_manager.h"
 
 namespace chromeos {
 
 DeviceDisabledScreen::DeviceDisabledScreen(
     BaseScreenDelegate* base_screen_delegate,
     DeviceDisabledScreenActor* actor)
     : BaseScreen(base_screen_delegate),
       showing_(false),
-      actor_(actor),
-      weak_factory_(this) {
+      actor_(actor) {
   DCHECK(actor_);
   if (actor_)
     actor_->SetDelegate(this);
 }
 
 DeviceDisabledScreen::~DeviceDisabledScreen() {
   if (actor_)
     actor_->SetDelegate(nullptr);
 }
 
 void DeviceDisabledScreen::PrepareToShow() {
 }
 
 void DeviceDisabledScreen::Show() {
   if (!actor_ || showing_)
     return;
 
-  if (policy::GetRestoreMode() != policy::RESTORE_MODE_DISABLED ||
-      CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDisableDeviceDisabling)) {
-    // Skip the screen if the device is not marked as disabled or device
-    // disabling has been turned off by flag.
-    IndicateDeviceNotDisabled();
-    return;
-  }
-
-  policy::BrowserPolicyConnectorChromeOS* connector =
-      g_browser_process->platform_part()->browser_policy_connector_chromeos();
-  if (connector->GetDeviceMode() == policy::DEVICE_MODE_PENDING) {
-    // Ensure that the device mode is known before proceeding.
-    connector->GetInstallAttributes()->ReadImmutableAttributes(
-        base::Bind(&DeviceDisabledScreen::Show,
-                   weak_factory_.GetWeakPtr()));
-    return;
-  }
-
-  if (connector->GetDeviceMode() != policy::DEVICE_MODE_NOT_SET) {
-    // Skip the screen if the device is owned already. The device disabling
-    // screen should only be shown during OOBE.
-    IndicateDeviceNotDisabled();
-    return;
-  }
-
   showing_ = true;
-
-  std::string message;
-  g_browser_process->local_state()->GetDictionary(
-      prefs::kServerBackedDeviceState)->GetString(
-          policy::kDeviceStateDisabledMessage,
-          &message);
-  actor_->Show(message);
+  actor_->Show(g_browser_process->platform_part()->device_disabling_manager()->
+                  disabled_message());
 }
 
 void DeviceDisabledScreen::Hide() {
   if (!showing_)
     return;
   showing_ = false;
 
   if (actor_)
     actor_->Hide();
 }
 
 std::string DeviceDisabledScreen::GetName() const {
   return WizardController::kDeviceDisabledScreenName;
 }
 
 void DeviceDisabledScreen::OnActorDestroyed(DeviceDisabledScreenActor* actor) {
   if (actor_ == actor)
     actor_ = nullptr;
 }
 
-void DeviceDisabledScreen::IndicateDeviceNotDisabled() {
-  get_base_screen_delegate()->OnExit(BaseScreenDelegate::DEVICE_NOT_DISABLED);
-}
-
 }  // namespace chromeos