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

ash/shell/widgets.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 "ash/shell.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/controls/button/checkbox.h"
@@ skipping 14 matching lines @@
 
 // A window showing samples of commonly used widgets.
 class WidgetsWindow : public views::WidgetDelegateView {
  public:
   WidgetsWindow();
   virtual ~WidgetsWindow();
 
   // Overridden from views::View:
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void Layout() OVERRIDE;
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
 
   // Overridden from views::WidgetDelegate:
   virtual views::View* GetContentsView() OVERRIDE;
   virtual base::string16 GetWindowTitle() const OVERRIDE;
   virtual bool CanResize() const OVERRIDE;
 
  private:
   views::LabelButton* button_;
   views::LabelButton* disabled_button_;
   views::Checkbox* checkbox_;
@@ skipping 92 matching lines @@
   gfx::Rect bounds(kWindowLeft, kWindowTop, kWindowWidth, kWindowHeight);
   views::Widget* widget =
       views::Widget::CreateWindowWithContextAndBounds(
           new WidgetsWindow, Shell::GetPrimaryRootWindow(), bounds);
   widget->GetNativeView()->SetName("WidgetsWindow");
   widget->Show();
 }
 
 }  // namespace shell
 }  // namespace ash