Update the maximize button when size constraints change.

athena/activity/activity_frame_view.h

 // Copyright 2014 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 ATHENA_ACTIVITY_ACTIVITY_FRAME_VIEW_H_
 #define ATHENA_ACTIVITY_ACTIVITY_FRAME_VIEW_H_
 
 #include "athena/wm/public/window_manager_observer.h"
 #include "ui/gfx/insets.h"
 #include "ui/views/window/non_client_view.h"
@@ skipping 21 matching lines @@
   // views::NonClientFrameView:
   virtual gfx::Rect GetBoundsForClientView() const OVERRIDE;
   virtual gfx::Rect GetWindowBoundsForClientBounds(
       const gfx::Rect& client_bounds) const OVERRIDE;
   virtual int NonClientHitTest(const gfx::Point& point) OVERRIDE;
   virtual void GetWindowMask(const gfx::Size& size,
                              gfx::Path* window_mask) OVERRIDE;
   virtual void ResetWindowControls() OVERRIDE;
   virtual void UpdateWindowIcon() OVERRIDE;
   virtual void UpdateWindowTitle() OVERRIDE;
+  virtual void SizeConstraintsChanged() OVERRIDE;
 
   // views::View:
   virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual const char* GetClassName() const OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual void OnPaintBackground(gfx::Canvas* canvas) OVERRIDE;
 
  private:
   // WindowManagerObserver:
   virtual void OnOverviewModeEnter() OVERRIDE;
@@ skipping 13 matching lines @@
 
   // Whether overview mode is active.
   bool in_overview_;
 
   DISALLOW_COPY_AND_ASSIGN(ActivityFrameView);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_ACTIVITY_ACTIVITY_FRAME_VIEW_H_