views: Make view::Views::GetPreferredSize() const.

ui/views/window/non_client_view.cc

 // 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.
 
 #include "ui/views/window/non_client_view.h"
 
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/base/hit_test.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/views/rect_based_targeting_utils.h"
@@ skipping 116 matching lines @@
   frame_view_->Layout();
 }
 
 void NonClientView::SetAccessibleName(const base::string16& name) {
   accessible_name_ = name;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NonClientView, View overrides:
 
-gfx::Size NonClientView::GetPreferredSize() {
+gfx::Size NonClientView::GetPreferredSize() const {
   // TODO(pkasting): This should probably be made to look similar to
   // GetMinimumSize() below.  This will require implementing GetPreferredSize()
   // better in the various frame views.
   gfx::Rect client_bounds(gfx::Point(), client_view_->GetPreferredSize());
   return GetWindowBoundsForClientBounds(client_bounds).size();
 }
 
-gfx::Size NonClientView::GetMinimumSize() {
+gfx::Size NonClientView::GetMinimumSize() const {
   return frame_view_->GetMinimumSize();
 }
 
 gfx::Size NonClientView::GetMaximumSize() {
   return frame_view_->GetMaximumSize();
 }
 
 void NonClientView::Layout() {
   LayoutFrameView();
 
@@ skipping 166 matching lines @@
 
 void NonClientFrameView::OnBoundsChanged(const gfx::Rect& previous_bounds) {
   // Overridden to do nothing. The NonClientView manually calls Layout on the
   // FrameView when it is itself laid out, see comment in NonClientView::Layout.
 }
 
 NonClientFrameView::NonClientFrameView() : inactive_rendering_disabled_(false) {
 }
 
 }  // namespace views