Update the maximize button when size constraints change.

ui/views/window/custom_frame_view.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_WINDOW_CUSTOM_FRAME_VIEW_H_
 #define UI_VIEWS_WINDOW_CUSTOM_FRAME_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 128 matching lines @@
 
   // The icon of this window. May be NULL.
   ImageButton* window_icon_;
 
   // Window caption buttons.
   ImageButton* minimize_button_;
   ImageButton* maximize_button_;
   ImageButton* restore_button_;
   ImageButton* close_button_;
 
-  // Should maximize button be shown?
-  bool should_show_maximize_button_;
-
   // Background painter for the window frame.
   scoped_ptr<FrameBackground> frame_background_;
 
   // The horizontal boundaries for the title bar to layout within. Restricted
   // by the space used by the leading and trailing buttons.
   int minimum_title_bar_x_;
   int maximum_title_bar_x_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomFrameView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WINDOW_CUSTOM_FRAME_VIEW_H_