GTK: Put options dialogs in a different window group.

chrome/browser/gtk/options/options_window_gtk.cc

 // Copyright (c) 2010 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/options_window.h"
 
 #include <gtk/gtk.h>
 
 #include "app/l10n_util.h"
 #include "base/message_loop.h"
@@ skipping 153 matching lines @@
   // connecting switch-page signal, otherwise we'll immediately get a
   // signal switching to page 0 and overwrite our last_selected_page_
   // value.
   gtk_widget_show_all(gtk_bin_get_child(GTK_BIN(dialog_)));
 
   if (Browser* b = BrowserList::GetLastActive()) {
     gtk_util::CenterOverWindow(GTK_WINDOW(dialog_),
                                b->window()->GetNativeHandle());
   }
 
+  // Now that we're centered over the browser, we add our dialog to its own
+  // window group. We don't do anything with the response and we don't want the
+  // options window's modal dialogs to be associated with the main browser
+  // window because gtk grabs work on a per window group basis.
+  gtk_window_group_add_window(gtk_window_group_new(), GTK_WINDOW(dialog_));
+  g_object_unref(gtk_window_get_group(GTK_WINDOW(dialog_)));
+
   g_signal_connect(notebook_, "switch-page", G_CALLBACK(OnSwitchPage), this);
 
   // We only have one button and don't do any special handling, so just hook it
   // directly to gtk_widget_destroy.
   g_signal_connect(dialog_, "response", G_CALLBACK(gtk_widget_destroy), NULL);
 
   g_signal_connect(dialog_, "destroy", G_CALLBACK(OnWindowDestroy), this);
 
   gtk_widget_show(dialog_);
 }
@@ skipping 69 matching lines @@
 
     // Create the options window.
     options_window = new OptionsWindowGtk(profile);
 
     // Resume accessibility events.
     profile->ResumeAccessibilityEvents();
   }
   options_window->ShowOptionsPage(page, highlight_group);
 }
 #endif  // !defined(OS_CHROMEOS)