views: Also const-ify GetMaximumSize().

chrome/browser/ui/views/message_center/message_center_widget_delegate.cc

 // Copyright 2013 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/message_center/message_center_widget_delegate.h"
 
 #include <complex>
 
 #include "chrome/browser/ui/views/message_center/message_center_frame_view.h"
 #include "chrome/browser/ui/views/message_center/web_notification_tray.h"
@@ skipping 99 matching lines @@
 void MessageCenterWidgetDelegate::PreferredSizeChanged() {
   GetWidget()->SetBounds(GetMessageCenterBounds());
   views::View::PreferredSizeChanged();
 }
 
 gfx::Size MessageCenterWidgetDelegate::GetPreferredSize() const {
   int preferred_width = kNotificationWidth + 2 * kMarginBetweenItems;
   return gfx::Size(preferred_width, GetHeightForWidth(preferred_width));
 }
 
-gfx::Size MessageCenterWidgetDelegate::GetMaximumSize() {
+gfx::Size MessageCenterWidgetDelegate::GetMaximumSize() const {
   gfx::Size size = GetPreferredSize();
   return size;
 }
 
 int MessageCenterWidgetDelegate::GetHeightForWidth(int width) const {
   int height = MessageCenterView::GetHeightForWidth(width);
   return (pos_info_.max_height != 0) ?
     std::min(height, pos_info_.max_height - border_insets_.height()) : height;
 }
 
@@ skipping 104 matching lines @@
     bounds.set_y(corrected_anchor.y() - size.height());
   if (pos_info_.message_center_alignment & ALIGNMENT_LEFT)
     bounds.set_x(corrected_anchor.x());
   if (pos_info_.message_center_alignment & ALIGNMENT_RIGHT)
     bounds.set_x(corrected_anchor.x() - size.width());
 
   return bounds;
 }
 
 }  // namespace message_center