Implement restart on Idle for Kiosk Mode.

chrome/browser/chromeos/retail_mode/retail_mode_screen_locker.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/chromeos/retail_mode/retail_mode_screen_locker.h"
+
+#include "base/bind.h"
+#include "base/lazy_instance.h"
+#include "base/logging.h"
+#include "base/message_loop.h"
+#include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
+#include "chrome/browser/chromeos/dbus/power_manager_client.h"
+#include "chrome/browser/ui/browser_dialogs.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/notification_service.h"
+
+namespace {
+
+const int64 kLoginIdleTimeout = 100; // seconds
+
+}  // namespace
+
+namespace chromeos {
+
+class RetailModeLoginObserver : public PowerManagerClient::Observer,
+                                public content::NotificationObserver {
+ public:
+  RetailModeLoginObserver() {
+    registrar_.Add(this, chrome::NOTIFICATION_LOGIN_USER_CHANGED,
+                   content::NotificationService::AllSources());
+  }
+
+  // NotificationObserver overrides:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE {
+    if (type == chrome::NOTIFICATION_LOGIN_USER_CHANGED) {
+      // Register our observers only when a user logs on.
+      chromeos::PowerManagerClient* power_manager =
+          chromeos::DBusThreadManager::Get()->GetPowerManagerClient();
+      if (!power_manager->HasObserver(this))
+        power_manager->AddObserver(this);
+
+      // Register for the next Idle for kLoginIdleTimeout event.
+      chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
+          RequestIdleNotification(kLoginIdleTimeout * 1000);
+    }
+  }
+
+  virtual void IdleNotify(int64 threshold) OVERRIDE {
+    // We're idle, next time we go active, we need to know so we can remove
+    // the logout dialog if it's still up.
+    chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
+        RequestActiveNotification();
+
+    browser::ShowRetailModeLogoutDialog();
+  }
+
+  virtual void ActiveNotify() OVERRIDE {
+    // Before anything else, close the logout dialog to prevent restart
+    browser::CloseRetailModeLogoutDialog();
+
+    // Now that we're active, register a request for notification for
+    // the next time we go idle for kLoginIdleTimeout seconds.
+    chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
+        RequestIdleNotification(kLoginIdleTimeout * 1000);
+  }
+
+ private:
+  content::NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(RetailModeLoginObserver);
+};
+
+static base::LazyInstance<RetailModeLoginObserver>
+    g_retail_mode_login_observer = LAZY_INSTANCE_INITIALIZER;
+
+// static
+void RetailModeScreenLocker::InitClass() {
+  g_retail_mode_login_observer.Get();
+}
+
+}  // namespace chromeos