Linux: call xdg-open on downloaded files to open them.

chrome/browser/gtk/download_item_gtk.h

 // Copyright (c) 2009 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_GTK_DOWNLOAD_ITEM_GTK_H_
 #define CHROME_BROWSER_GTK_DOWNLOAD_ITEM_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "app/animation.h"
@@ skipping 50 matching lines @@
 
   // Ask the icon manager to asynchronously start loading the icon for the file.
   void LoadIcon();
 
   static void InitNineBoxes();
 
   // Used for the download item's body and menu button.
   static gboolean OnExpose(GtkWidget* widget, GdkEventExpose* e,
                            DownloadItemGtk* download_item);
 
+  // Called when |body_| is clicked.
+  static void OnClick(GtkWidget* widget, DownloadItemGtk* item);
+
   // Used for the download icon.
   static gboolean OnProgressAreaExpose(GtkWidget* widget,
                                        GdkEventExpose* e,
                                        DownloadItemGtk* download_item);
 
   static gboolean OnMenuButtonPressEvent(GtkWidget* button,
                                          GdkEvent* event,
                                          DownloadItemGtk* item);
 
   static void OnShelfResized(GtkWidget *widget,
@@ skipping 83 matching lines @@
   scoped_ptr<SlideAnimation> complete_animation_;
 
   // The file icon for the download. May be null.
   SkBitmap* icon_;
 
   // For canceling an in progress icon request.
   CancelableRequestConsumerT<int, 0> icon_consumer_;
 };
 
 #endif  // CHROME_BROWSER_GTK_DOWNLOAD_ITEM_GTK_H_