1 // Copyright (c) 2012 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_COMMAND_OBSERVER_H_ 6 #define CHROME_BROWSER_COMMAND_OBSERVER_H_ 7 8 // An Observer interface implemented by objects that want to be informed when 9 // the state of a particular command ID is modified. See CommandUpdater. 10 class CommandObserver { 11 public: 12 // Notifies the observer that the enabled state has changed for the 13 // specified command id. 14 virtual void EnabledStateChangedForCommand(int id, bool enabled) = 0; 15 16 protected: ~CommandObserver()17 virtual ~CommandObserver() {} 18 }; 19 20 #endif // CHROME_BROWSER_COMMAND_OBSERVER_H_ 21