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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 ASH_WM_CAPTION_BUTTONS_FRAME_MAXIMIZE_BUTTON_OBSERVER_H_
      6 #define ASH_WM_CAPTION_BUTTONS_FRAME_MAXIMIZE_BUTTON_OBSERVER_H_
      7 
      8 #include "ash/ash_export.h"
      9 
     10 namespace views {
     11 class Widget;
     12 }
     13 
     14 namespace ash {
     15 
     16 class ASH_EXPORT FrameMaximizeButtonObserver {
     17  public:
     18   virtual ~FrameMaximizeButtonObserver() {}
     19 
     20   // Called when the maximize button's help bubble is shown.
     21   virtual void OnMaximizeBubbleShown(views::Widget* bubble) = 0;
     22 };
     23 
     24 }  // namespace ash
     25 
     26 #endif  // ASH_WM_CAPTION_BUTTONS_FRAME_MAXIMIZE_BUTTON_OBSERVER_H_
     27