Add experimental extension APIs to notify about wakeup and screen unlock

chrome/browser/chromeos/accessibility/system_event_observer.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/accessibility/system_event_observer.h"
+
+#include "base/logging.h"
+#include "chrome/browser/accessibility_events.h"
+#include "chrome/browser/chromeos/cros/cros_library.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/common/chrome_notification_types.h"
+
+namespace chromeos {
+namespace accessibility {
+
+namespace {
+
+SystemEventObserver* g_system_event_observer = NULL;
+
+}
+
+SystemEventObserver::SystemEventObserver() {
+  CrosLibrary::Get()->GetPowerLibrary()->AddObserver(this);
+  CrosLibrary::Get()->GetScreenLockLibrary()->AddObserver(this);
+}
+
+SystemEventObserver::~SystemEventObserver() {
+  CrosLibrary::Get()->GetScreenLockLibrary()->RemoveObserver(this);
+  CrosLibrary::Get()->GetPowerLibrary()->RemoveObserver(this);
+}
+
+void SystemEventObserver::SystemResumed() {
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  AccessibilityEmptyEventInfo info(profile);
+  SendAccessibilityNotification(
+      chrome::NOTIFICATION_ACCESSIBILITY_WOKE_UP, &info);
+}
+
+void SystemEventObserver::LockScreen(ScreenLockLibrary* screen_lock_library) {
+}
+
+void SystemEventObserver::UnlockScreen(ScreenLockLibrary* screen_lock_library) {
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  AccessibilityEmptyEventInfo info(profile);
+  SendAccessibilityNotification(
+      chrome::NOTIFICATION_ACCESSIBILITY_SCREEN_UNLOCKED, &info);
+}
+
+void SystemEventObserver::UnlockScreenFailed(
+    ScreenLockLibrary* screen_lock_library) {
+}
+
+// static
+void SystemEventObserver::Initialize() {
+  DCHECK(!g_system_event_observer);
+  g_system_event_observer = new SystemEventObserver();
+  VLOG(1) << "SystemEventObserver initialized";
+}
+
+// static
+SystemEventObserver* SystemEventObserver::GetInstance() {
+  return g_system_event_observer;
+}
+
+// static
+void SystemEventObserver::Shutdown() {
+  DCHECK(g_system_event_observer);
+  delete g_system_event_observer;
+  g_system_event_observer = NULL;
+  VLOG(1) << "SystemEventObserver Shutdown completed";
+}
+
+}  // namespace accessibility
+}  // namespace chromeos