Notificaitons refactor step 2

ui/notifications/notification_types.h

-// 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.
-
-#ifndef UI_NOTIFICATIONS_NOTIFICATION_TYPES_H_
-#define UI_NOTIFICATIONS_NOTIFICATION_TYPES_H_
-
-#include <string>
-
-#include "ui/base/ui_export.h"
-
-namespace ui {
-
-namespace notifications {
-
-// Keys for optional fields in Notification.
-UI_EXPORT extern const char kPriorityKey[];
-UI_EXPORT extern const char kTimestampKey[];
-UI_EXPORT extern const char kUnreadCountKey[];
-UI_EXPORT extern const char kButtonOneTitleKey[];
-UI_EXPORT extern const char kButtonOneIconUrlKey[];
-UI_EXPORT extern const char kButtonTwoTitleKey[];
-UI_EXPORT extern const char kButtonTwoIconUrlKey[];
-UI_EXPORT extern const char kExpandedMessageKey[];
-UI_EXPORT extern const char kImageUrlKey[];
-UI_EXPORT extern const char kItemsKey[];
-UI_EXPORT extern const char kItemTitleKey[];
-UI_EXPORT extern const char kItemMessageKey[];
-
-enum NotificationType {
-  NOTIFICATION_TYPE_SIMPLE,
-  NOTIFICATION_TYPE_BASE_FORMAT,
-  NOTIFICATION_TYPE_IMAGE,
-  NOTIFICATION_TYPE_MULTIPLE,
-};
-
-enum NotificationPriority {
-  MIN_PRIORITY = -2,
-  LOW_PRIORITY = -1,
-  DEFAULT_PRIORITY = 0,
-  HIGH_PRIORITY = 1,
-  MAX_PRIORITY = 2,
-};
-
-}  // namespace notifications
-
-}  // namespace ui
-
-#endif // UI_NOTIFICATIONS_NOTIFICATION_TYPES_H_