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_UI_ZOOM_ZOOM_OBSERVER_H_ 6 #define CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_ 7 8 namespace content { 9 class WebContents; 10 } 11 12 // Interface for objects that wish to be notified of changes in ZoomController. 13 class ZoomObserver { 14 public: 15 // Notification that the zoom percentage has changed. 16 virtual void OnZoomChanged(content::WebContents* source, 17 bool can_show_bubble) = 0; 18 19 protected: ~ZoomObserver()20 virtual ~ZoomObserver() {} 21 }; 22 23 #endif // CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_ 24