Devirtualize CHROMEG_CALLBACK

ui/base/clipboard/clipboard_gtk.cc

 // 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.
 
 #include "ui/base/clipboard/clipboard.h"
 
 #include <gtk/gtk.h>
 #include <X11/extensions/Xfixes.h>
 #include <X11/Xatom.h>
 #include <map>
@@ skipping 22 matching lines @@
 
   uint64 clipboard_sequence_number() const {
     return clipboard_sequence_number_;
   }
   uint64 primary_sequence_number() const { return primary_sequence_number_; }
 
  private:
   friend struct DefaultSingletonTraits<SelectionChangeObserver>;
 
   SelectionChangeObserver();
-  virtual ~SelectionChangeObserver();
+  ~SelectionChangeObserver();
 
   CHROMEG_CALLBACK_1(SelectionChangeObserver, GdkFilterReturn, OnXEvent,
                      GdkXEvent*, GdkEvent*);
 
   int event_base_;
   Atom clipboard_atom_;
   uint64 clipboard_sequence_number_;
   uint64 primary_sequence_number_;
 
   DISALLOW_COPY_AND_ASSIGN(SelectionChangeObserver);
@@ skipping 493 matching lines @@
       return clipboard_;
     case BUFFER_SELECTION:
       return primary_selection_;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace ui