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      1 // Copyright 2013 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 UI_BASE_ANDROID_WINDOW_ANDROID_OBSERVER_H_
      6 #define UI_BASE_ANDROID_WINDOW_ANDROID_OBSERVER_H_
      7 
      8 #include "ui/base/ui_base_export.h"
      9 
     10 namespace ui {
     11 
     12 class UI_BASE_EXPORT WindowAndroidObserver {
     13  public:
     14   virtual void OnCompositingDidCommit() = 0;
     15   virtual void OnAttachCompositor() = 0;
     16   virtual void OnDetachCompositor() = 0;
     17   virtual void OnVSync(base::TimeTicks frame_time,
     18                        base::TimeDelta vsync_period) = 0;
     19   virtual void OnAnimate(base::TimeTicks frame_begin_time) {}
     20 
     21  protected:
     22   virtual ~WindowAndroidObserver() {}
     23 };
     24 
     25 }  // namespace ui
     26 
     27 #endif  // UI_BASE_ANDROID_WINDOW_ANDROID_OBSERVER_H_
     28