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// Copyright (c) 2010 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 CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_OBSERVER_H_
#define CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_OBSERVER_H_
// Various UI components such as the New Tab page can be driven by observing
// the ProfileSyncService through this interface.
class ProfileSyncServiceObserver {
public:
// When one of the following events occurs, OnStateChanged() is called.
// Observers should query the service to determine what happened.
// - We initialized successfully.
// - There was an authentication error and the user needs to reauthenticate.
// - The sync servers are unavailable at this time.
// - Credentials are now in flight for authentication.
virtual void OnStateChanged() = 0;
protected:
virtual ~ProfileSyncServiceObserver() { }
};
#endif // CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_OBSERVER_H_
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