views: Also const-ify GetMaximumSize().

chrome/browser/ui/views/apps/glass_app_window_frame_view_win.cc

 // 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.
 
 #include "chrome/browser/ui/views/apps/glass_app_window_frame_view_win.h"
 
 #include "apps/ui/native_app_window.h"
 #include "ui/base/hit_test.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
@@ skipping 98 matching lines @@
   return kViewClassName;
 }
 
 gfx::Size GlassAppWindowFrameViewWin::GetMinimumSize() const {
   gfx::Size min_size = widget_->client_view()->GetMinimumSize();
   gfx::Rect client_bounds = GetBoundsForClientView();
   min_size.Enlarge(0, client_bounds.y());
   return min_size;
 }
 
-gfx::Size GlassAppWindowFrameViewWin::GetMaximumSize() {
+gfx::Size GlassAppWindowFrameViewWin::GetMaximumSize() const {
   gfx::Size max_size = widget_->client_view()->GetMaximumSize();
 
   // Add to the client maximum size the height of any title bar and borders.
   gfx::Size client_size = GetBoundsForClientView().size();
   if (max_size.width())
     max_size.Enlarge(width() - client_size.width(), 0);
   if (max_size.height())
     max_size.Enlarge(0, height() - client_size.height());
 
   return max_size;
 }