components/sessions/core/tab_restore_service_observer.h

   1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_OBSERVER_H_
   6 #define COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_OBSERVER_H_
   7
   8 #include "components/sessions/sessions_export.h"
   9
  10 namespace sessions {
  11
  12 class TabRestoreService;
  13
  14 // Observer is notified when the set of entries managed by TabRestoreService
  15 // changes in some way.
  16 class SESSIONS_EXPORT TabRestoreServiceObserver {
  17  public:
  18   // Sent when the set of entries changes in some way.
  19   virtual void TabRestoreServiceChanged(TabRestoreService* service) = 0;
  20
  21   // Sent to all remaining Observers when TabRestoreService's
  22   // destructor is run.
  23   virtual void TabRestoreServiceDestroyed(TabRestoreService* service) = 0;
  24
  25   // Sent when TabRestoreService finishes loading.
  26   virtual void TabRestoreServiceLoaded(TabRestoreService* service) {}
  27
  28  protected:
  29   virtual ~TabRestoreServiceObserver() {}
  30 };
  31
  32 }  // namespace sessions
  33
  34 #endif  // COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_OBSERVER_H_