text: // 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 CHROME_BROWSER_GOOGLE_APIS_AUTH_SERVICE_OBSERVER_H_
  #define CHROME_BROWSER_GOOGLE_APIS_AUTH_SERVICE_OBSERVER_H_
  
  namespace google_apis {
  
  // Interface for classes that need to observe events from AuthService.
  // All events are notified on UI thread.
  class AuthServiceObserver {
   public:
    // Triggered when a new OAuth2 refresh token is received from AuthService.
    virtual void OnOAuth2RefreshTokenChanged() = 0;
  
   protected:
    virtual ~AuthServiceObserver() {}
  };
  
  }  // namespace google_apis
  
  #endif  // CHROME_BROWSER_GOOGLE_APIS_AUTH_SERVICE_OBSERVER_H_
  