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

ash/system/user/user_view.cc

 // Copyright 2014 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/system/user/user_view.h"
 
 #include <algorithm>
 
 #include "ash/multi_profile_uma.h"
 #include "ash/popup_message.h"
@@ skipping 119 matching lines @@
  public:
   // The |owner| is the view for which this view gets created.
   AddUserView(ButtonFromView* owner);
   virtual ~AddUserView();
 
   // Get the anchor view for a message.
   views::View* anchor() { return anchor_; }
 
  private:
   // Overridden from views::View.
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
 
   // Create the additional client content for this item.
   void AddContent();
 
   // This is the content we create and show.
   views::View* add_user_;
 
   // This is the owner view of this item.
   ButtonFromView* owner_;
 
@@ skipping 332 matching lines @@
   // watcher which will close the "menu".
   gfx::Rect area = user_card_view_->GetBoundsInScreen();
   area.set_height(2 * area.height());
   mouse_watcher_.reset(
       new views::MouseWatcher(new UserViewMouseWatcherHost(area), this));
   mouse_watcher_->Start();
 }
 
 }  // namespace tray
 }  // namespace ash