chrome/browser/extensions/state_store_notification_observer.h

   1 // Copyright 2014 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 CHROME_BROWSER_EXTENSIONS_STATE_STORE_NOTIFICATION_OBSERVER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_STATE_STORE_NOTIFICATION_OBSERVER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/macros.h"
  10 #include "chrome/browser/sessions/session_restore.h"
  11
  12 namespace extensions {
  13 class StateStore;
  14
  15 // Initializes the StateStore when session restore is complete, for example when
  16 // page load notifications are not sent ("Continue where I left off").
  17 // http://crbug.com/230481
  18 class StateStoreNotificationObserver {
  19  public:
  20   explicit StateStoreNotificationObserver(StateStore* state_store);
  21   ~StateStoreNotificationObserver();
  22
  23  private:
  24   // Called when a session restore has finished.
  25   void OnSessionRestoreDone(int num_tabs_restored);
  26
  27   StateStore* state_store_;  // Not owned.
  28
  29   // Points to the on-session-restored callback that was registered with
  30   // SessionRestore's callback list. When objects of this class are destroyed,
  31   // the subscription object's destructor will automatically unregister the
  32   // callback in SessionRestore, so that the callback list does not contain any
  33   // obsolete callbacks.
  34   SessionRestore::CallbackSubscription
  35       on_session_restored_callback_subscription_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(StateStoreNotificationObserver);
  38 };
  39
  40 }  // namespace extensions
  41
  42 #endif  // CHROME_BROWSER_EXTENSIONS_STATE_STORE_NOTIFICATION_OBSERVER_H_