Wunused-private-field for linux

ui/views/window/client_view.h

 // Copyright (c) 2011 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_CLIENT_VIEW_H_
 #define UI_VIEWS_WINDOW_CLIENT_VIEW_H_
 #pragma once
 
 #include "ui/views/view.h"
 
@@ skipping 59 matching lines @@
                                     View* parent,
                                     View* child) OVERRIDE;
 
   // Accessors for private data members.
   View* contents_view() const { return contents_view_; }
   void set_contents_view(View* contents_view) {
     contents_view_ = contents_view;
   }
 
  private:
-  // The Widget that hosts this ClientView.
-  Widget* widget_;
-
   // The View that this ClientView contains.
   View* contents_view_;
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WINDOW_CLIENT_VIEW_H_