Allow to open multiple modal file-pickers in Linux

chrome/browser/ui/libgtkui/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 "chrome/browser/ui/libgtkui/select_file_dialog_impl_gtk.h"
 
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 #include <stddef.h>
 #include <sys/stat.h>
@@ skipping 157 matching lines @@
 
   params_map_[dialog] = params;
 
   // Disable input events handling in the host window to make this dialog modal.
   if (owning_window) {
     aura::WindowTreeHost* host = owning_window->GetHost();
     if (host) {
       std::unique_ptr<base::Closure> callback =
           views::DesktopWindowTreeHostX11::GetHostForXID(
               host->GetAcceleratedWidget())
-              ->DisableEventListening(
-                  GDK_WINDOW_XID(gtk_widget_get_window(dialog)));
+              ->DisableEventListening();
       // OnFilePickerDestroy() is called when |dialog| destroyed, which allows
       // to invoke the callback function to re-enable event handling on the
       // owning window.
       g_object_set_data_full(
           G_OBJECT(dialog), "callback", callback.release(),
           reinterpret_cast<GDestroyNotify>(OnFilePickerDestroy));
       gtk_window_set_modal(GTK_WINDOW(dialog), TRUE);
     }
   }
 
@@ skipping 366 matching lines @@
   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);
 }
 
 }  // namespace libgtkui