Help: Implement the initial version of the cross-platform help/about page.

chrome/browser/ui/webui/help/version_updater_chromeos.cc

+// 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.
+
+#include "chrome/browser/ui/webui/help/version_updater_chromeos.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
+#include "chrome/browser/chromeos/dbus/power_manager_client.h"
+#include "chrome/browser/chromeos/login/wizard_controller.h"
+
+using chromeos::DBusThreadManager;
+using chromeos::UpdateEngineClient;
+using chromeos::WizardController;
+
+VersionUpdater* VersionUpdater::Create() {
+  return static_cast<VersionUpdater*>(new VersionUpdaterCros);
+}
+
+bool VersionUpdaterCros::CanBeUpdated() const {
+  return true;
+}
+
+void VersionUpdaterCros::CheckForUpdate(const StatusCallback& callback) {
+  callback_ = callback;
+
+  UpdateEngineClient* update_engine_client =
+      DBusThreadManager::Get()->GetUpdateEngineClient();
+  update_engine_client->AddObserver(this);
+
+  // Make sure that libcros is loaded and OOBE is complete.
+  if (!WizardController::default_controller() ||
+      WizardController::IsDeviceRegistered()) {
+    update_engine_client->RequestUpdateCheck(
+        UpdateEngineClient::EmptyUpdateCheckCallback());
+  }
+}
+
+void VersionUpdaterCros::RelaunchBrowser() const {
+  DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
+}
+
+VersionUpdaterCros::~VersionUpdaterCros() {
+  UpdateEngineClient* update_engine_client =
+      DBusThreadManager::Get()->GetUpdateEngineClient();
+  update_engine_client->RemoveObserver(this);
+}
+
+void VersionUpdaterCros::UpdateStatusChanged(
+    const UpdateEngineClient::Status& status) OVERRIDE {

[Nico, 2012/02/05 04:50:28]

OVERRIDE in cc files is a compile error

+  Status my_status = UPDATED;
+  int progress = 0;
+
+  switch (status.status) {
+    case UpdateEngineClient::UPDATE_STATUS_CHECKING_FOR_UPDATE:
+      my_status = CHECKING;
+      break;
+    case UpdateEngineClient::UPDATE_STATUS_DOWNLOADING:
+      progress = static_cast<int>(status.download_progress * 100.0);
+      // Fall through.
+    case UpdateEngineClient::UPDATE_STATUS_UPDATE_AVAILABLE:
+    case UpdateEngineClient::UPDATE_STATUS_VERIFYING:
+    case UpdateEngineClient::UPDATE_STATUS_FINALIZING:
+      my_status = UPDATING;
+      break;
+    case UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT:
+      my_status = NEARLY_UPDATED;
+      break;
+    default:
+      break;
+  }
+
+  callback_.Run(my_status, progress);
+}