1 // Copyright 2019 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_UI_EXCLUSIVE_ACCESS_FULLSCREEN_OBSERVER_H_ 6 #define CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_FULLSCREEN_OBSERVER_H_ 7 8 #include "base/observer_list_types.h" 9 10 // An interface to be notified of changes in FullscreenController. 11 class FullscreenObserver : public base::CheckedObserver { 12 public: 13 virtual void OnFullscreenStateChanged() = 0; 14 }; 15 16 #endif // CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_FULLSCREEN_OBSERVER_H_ 17