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

ui/views/window/dialog_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/dialog_client_view.h"
 
 #include <algorithm>
 
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/views/background.h"
@@ skipping 157 matching lines @@
     default_button_->SetIsDefault(true);
 }
 
 void DialogClientView::OnDidChangeFocus(View* focused_before,
                                         View* focused_now) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DialogClientView, View overrides:
 
-gfx::Size DialogClientView::GetPreferredSize() {
+gfx::Size DialogClientView::GetPreferredSize() const {
   // Initialize the size to fit the buttons and extra view row.
   gfx::Size size(
       (ok_button_ ? ok_button_->GetPreferredSize().width() : 0) +
       (cancel_button_ ? cancel_button_->GetPreferredSize().width() : 0) +
       (cancel_button_ && ok_button_ ? kRelatedButtonHSpacing : 0) +
       (ShouldShow(extra_view_) ? extra_view_->GetPreferredSize().width() : 0) +
       (ShouldShow(extra_view_) && has_dialog_buttons() ?
            kRelatedButtonHSpacing : 0),
       0);
 
@@ skipping 230 matching lines @@
       gfx::Insets(0, kButtonHEdgeMarginNew,
                   kButtonVEdgeMarginNew, kButtonHEdgeMarginNew);
 }
 
 void DialogClientView::Close() {
   GetWidget()->Close();
   GetDialogDelegate()->OnClosed();
 }
 
 }  // namespace views