Add ash SessionStateDelegate

chrome/browser/ui/ash/session_state_delegate_chromeos.cc

+// Copyright (c) 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/session_state_delegate.h"
+
+#include "base/logging.h"
+#include "chrome/browser/chromeos/login/screen_locker.h"
+#include "chrome/browser/chromeos/login/user_manager.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/session_manager_client.h"
+
+SessionStateDelegate::SessionStateDelegate() {
+}
+
+SessionStateDelegate::~SessionStateDelegate() {
+}
+
+bool SessionStateDelegate::HasActiveUser() const {
+  return chromeos::UserManager::Get()->IsUserLoggedIn();
+}
+
+bool SessionStateDelegate::IsActiveUserSessionStarted() const {
+  return chromeos::UserManager::Get()->IsSessionStarted();
+}
+
+bool SessionStateDelegate::CanLockScreen() const {
+  return chromeos::UserManager::Get()->CanCurrentUserLock();
+}
+
+bool SessionStateDelegate::IsScreenLocked() const {
+  return chromeos::ScreenLocker::default_screen_locker() &&
+         chromeos::ScreenLocker::default_screen_locker()->locked();
+}
+
+void SessionStateDelegate::LockScreen() {
+  if (!CanLockScreen())
+    return;
+
+  // TODO(antrim): Additional logging for http://crbug.com/173178.
+  LOG(WARNING) << "Requesting screen lock from SessionStateDelegate";
+  chromeos::DBusThreadManager::Get()->GetSessionManagerClient()->
+      RequestLockScreen();
+}
+
+void SessionStateDelegate::UnlockScreen() {
+  // This is used only for testing thus far.
+  NOTIMPLEMENTED();
+}