Update the maximize button when size constraints change.

ui/views/window/non_client_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_NON_CLIENT_VIEW_H_
 #define UI_VIEWS_WINDOW_NON_CLIENT_VIEW_H_
 
 #include "ui/views/view.h"
 #include "ui/views/view_targeter_delegate.h"
 
@@ skipping 61 matching lines @@
   // This function must ask the ClientView to do a hittest.  We don't do this in
   // the parent NonClientView because that makes it more difficult to calculate
   // hittests for regions that are partially obscured by the ClientView, e.g.
   // HTSYSMENU.
   virtual int NonClientHitTest(const gfx::Point& point) = 0;
   virtual void GetWindowMask(const gfx::Size& size,
                              gfx::Path* window_mask) = 0;
   virtual void ResetWindowControls() = 0;
   virtual void UpdateWindowIcon() = 0;
   virtual void UpdateWindowTitle() = 0;
+  virtual void SizeConstraintsChanged() = 0;
 
   // View:
   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
   virtual const char* GetClassName() const OVERRIDE;
 
  protected:
   virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE;
 
   NonClientFrameView();
 
@@ skipping 96 matching lines @@
   // when the window is maximized, minimized or restored.
   void ResetWindowControls();
 
   // Tells the NonClientView to invalidate the NonClientFrameView's window icon.
   void UpdateWindowIcon();
 
   // Tells the NonClientView to invalidate the NonClientFrameView's window
   // title.
   void UpdateWindowTitle();
 
+  // Called when the size constraints of the window change.
+  void SizeConstraintsChanged();
+
   // Get/Set client_view property.
   ClientView* client_view() const { return client_view_; }
   void set_client_view(ClientView* client_view) {
     client_view_ = client_view;
   }
 
   // Layout just the frame view. This is necessary on Windows when non-client
   // metrics such as the position of the window controls changes independently
   // of a window resize message.
   void LayoutFrameView();
@@ skipping 37 matching lines @@
 
   // The accessible name of this view.
   base::string16 accessible_name_;
 
   DISALLOW_COPY_AND_ASSIGN(NonClientView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WINDOW_NON_CLIENT_VIEW_H_