michael@0: // Copyright (c) 2009 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #ifndef CHROME_COMMON_NOTIFICATION_OBSERVER_H_
michael@0: #define CHROME_COMMON_NOTIFICATION_OBSERVER_H_
michael@0: 
michael@0: class NotificationDetails;
michael@0: class NotificationSource;
michael@0: class NotificationType;
michael@0: 
michael@0: // This is the base class for notification observers. When a matching
michael@0: // notification is posted to the notification service, Observe is called.
michael@0: class NotificationObserver {
michael@0:  public:
michael@0:   virtual ~NotificationObserver();
michael@0: 
michael@0:   virtual void Observe(NotificationType type,
michael@0:                        const NotificationSource& source,
michael@0:                        const NotificationDetails& details) = 0;
michael@0: };
michael@0: 
michael@0: #endif  // CHROME_COMMON_NOTIFICATION_OBSERVER_H_