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

ui/views/window/non_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_NON_CLIENT_VIEW_H_
 #define UI_VIEWS_WINDOW_NON_CLIENT_VIEW_H_
 
 #include "ui/views/view.h"
 
 namespace gfx {
@@ skipping 187 matching lines @@
 
   // Layout just the frame view. This is necessary on Windows when non-client
   // metrics such as the position of the window controls changes independently
   // of a window resize message.
   void LayoutFrameView();
 
   // Set the accessible name of this view.
   void SetAccessibleName(const base::string16& name);
 
   // NonClientView, View overrides:
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
-  virtual gfx::Size GetMinimumSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
+  virtual gfx::Size GetMinimumSize() const OVERRIDE;
   virtual gfx::Size GetMaximumSize() OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
   virtual const char* GetClassName() const OVERRIDE;
 
   virtual views::View* GetEventHandlerForRect(const gfx::Rect& rect) OVERRIDE;
   virtual views::View* GetTooltipHandlerForPoint(
       const gfx::Point& point) OVERRIDE;
 
  protected:
@@ skipping 18 matching lines @@
 
   // The accessible name of this view.
   base::string16 accessible_name_;
 
   DISALLOW_COPY_AND_ASSIGN(NonClientView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WINDOW_NON_CLIENT_VIEW_H_