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

chrome/browser/ui/views/frame/opaque_browser_frame_view_layout.h

 // Copyright 2013 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 CHROME_BROWSER_UI_VIEWS_FRAME_OPAQUE_BROWSER_FRAME_VIEW_LAYOUT_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_OPAQUE_BROWSER_FRAME_VIEW_LAYOUT_H_
 
 #include "chrome/browser/ui/views/frame/opaque_browser_frame_view.h"
 #include "ui/views/layout/layout_manager.h"
 #include "ui/views/window/frame_buttons.h"
@@ skipping 122 matching lines @@
   void SetBoundsForButton(views::View* host,
                           views::ImageButton* button,
                           ButtonAlignment align,
                           int caption_y);
 
   // Internal implementation of ViewAdded() and ViewRemoved().
   void SetView(int id, views::View* view);
 
   // Overriden from views::LayoutManager:
   virtual void Layout(views::View* host) OVERRIDE;
-  virtual gfx::Size GetPreferredSize(views::View* host) OVERRIDE;
+  virtual gfx::Size GetPreferredSize(const views::View* host) const OVERRIDE;
   virtual void ViewAdded(views::View* host, views::View* view) OVERRIDE;
   virtual void ViewRemoved(views::View* host, views::View* view) OVERRIDE;
 
   OpaqueBrowserFrameViewLayoutDelegate* delegate_;
 
   // The layout rect of the avatar icon, if visible.
   gfx::Rect avatar_bounds_;
 
   // The bounds of the ClientView.
   gfx::Rect client_view_bounds_;
@@ skipping 35 matching lines @@
   AvatarMenuButton* avatar_button_;
   views::View* new_avatar_button_;
 
   std::vector<views::FrameButton> leading_buttons_;
   std::vector<views::FrameButton> trailing_buttons_;
 
   DISALLOW_COPY_AND_ASSIGN(OpaqueBrowserFrameViewLayout);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_OPAQUE_BROWSER_FRAME_VIEW_LAYOUT_H_