Revert 194578 "Add ash SessionStateDelegate"

trunk/src/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();
-}