RefCounted types should not have public destructors, Linux fixes

chrome/browser/ui/gtk/select_file_dialog_impl_gtk.cc

 // 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.
 
 #include <gtk/gtk.h>
 #include <map>
 #include <set>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 12 matching lines @@
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/l10n/l10n_util.h"
 
 // Implementation of SelectFileDialog that shows a Gtk common dialog for
 // choosing a file or folder. This acts as a modal dialog.
 class SelectFileDialogImplGTK : public SelectFileDialogImpl {
  public:
   explicit SelectFileDialogImplGTK(Listener* listener);
 
  protected:
+  virtual ~SelectFileDialogImplGTK();
+
   // SelectFileDialog implementation.
   // |params| is user data we pass back via the Listener interface.
   virtual void SelectFileImpl(Type type,
                               const string16& title,
                               const FilePath& default_path,
                               const FileTypeInfo* file_types,
                               int file_type_index,
                               const FilePath::StringType& default_extension,
                               gfx::NativeWindow owning_window,
                               void* params) OVERRIDE;
 
  private:
-  virtual ~SelectFileDialogImplGTK();
-
   virtual bool HasMultipleFileTypeChoicesImpl() OVERRIDE;
 
   // Add the filters from |file_types_| to |chooser|.
   void AddFilters(GtkFileChooser* chooser);
 
   // Notifies the listener that a single file was chosen.
   void FileSelected(GtkWidget* dialog, const FilePath& path);
 
   // Notifies the listener that multiple files were chosen.
   void MultiFilesSelected(GtkWidget* dialog,
@@ skipping 498 matching lines @@
   GdkPixbuf* pixbuf = gdk_pixbuf_new_from_file_at_size(filename, kPreviewWidth,
                                                        kPreviewHeight, NULL);
   g_free(filename);
   if (pixbuf) {
     gtk_image_set_from_pixbuf(GTK_IMAGE(preview_), pixbuf);
     g_object_unref(pixbuf);
   }
   gtk_file_chooser_set_preview_widget_active(GTK_FILE_CHOOSER(chooser),
                                              pixbuf ? TRUE : FALSE);
 }