Re-enable save package on linux.

chrome/common/platform_util_linux.cc

 // 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.
 
 #include "chrome/common/platform_util.h"
 
+#include <gtk/gtk.h>
+
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/process_util.h"
 
 namespace platform_util {
 
 // TODO(estade): It would be nice to be able to select the file in the file
 // manager, but that probably requires extending xdg-open. For now just
 // show the folder.
 void ShowItemInFolder(const FilePath& full_path) {
   FilePath dir = full_path.DirName();
   if (!file_util::DirectoryExists(dir))
     return;
 
   std::vector<std::string> argv;
   argv.push_back("xdg-open");
   argv.push_back(dir.value());
   base::file_handle_mapping_vector no_files;
   base::LaunchApp(argv, no_files, false, NULL);
 }
 
+gfx::NativeWindow GetTopLevel(gfx::NativeView view) {
+  return GTK_WINDOW(gtk_widget_get_toplevel(view));
+}
+
 }  // namespace platform_util