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

ui/views/window/dialog_client_view.h

 // 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.
 
 #ifndef UI_VIEWS_WINDOW_DIALOG_CLIENT_VIEW_H_
 #define UI_VIEWS_WINDOW_DIALOG_CLIENT_VIEW_H_
 
 #include "ui/base/ui_base_types.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/focus/focus_manager.h"
@@ skipping 39 matching lines @@
   virtual DialogClientView* AsDialogClientView() OVERRIDE;
   virtual const DialogClientView* AsDialogClientView() const OVERRIDE;
 
   // FocusChangeListener implementation:
   virtual void OnWillChangeFocus(View* focused_before,
                                  View* focused_now) OVERRIDE;
   virtual void OnDidChangeFocus(View* focused_before,
                                 View* focused_now) OVERRIDE;
 
   // View implementation:
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
   virtual void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) OVERRIDE;
   virtual void NativeViewHierarchyChanged() OVERRIDE;
   virtual void OnNativeThemeChanged(const ui::NativeTheme* theme) OVERRIDE;
 
   // ButtonListener implementation:
   virtual void ButtonPressed(Button* sender, const ui::Event& event) OVERRIDE;
 
@@ skipping 55 matching lines @@
   // http://crbug.com/71940). This is used to avoid notifying the delegate
   // twice, which can have bad consequences.
   bool notified_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(DialogClientView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WINDOW_DIALOG_CLIENT_VIEW_H_