GTK: Put options dialogs in a different window group.

chrome/browser/gtk/options/content_settings_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/gtk/options/content_settings_window_gtk.h"
 
 #include <string>
 
 #include "app/l10n_util.h"
 #include "base/command_line.h"
@@ skipping 128 matching lines @@
   g_signal_connect(dialog_, "response", G_CALLBACK(gtk_widget_destroy), NULL);
 
   g_signal_connect(dialog_, "destroy", G_CALLBACK(OnWindowDestroyThunk), this);
 }
 
 ContentSettingsWindowGtk::~ContentSettingsWindowGtk() {
 }
 
 void ContentSettingsWindowGtk::ShowContentSettingsTab(
     ContentSettingsType page) {
-  if (Browser* b = BrowserList::GetLastActive()) {
-    gtk_util::CenterOverWindow(GTK_WINDOW(dialog_),
-                               b->window()->GetNativeHandle());
-  }
-
   // Bring options window to front if it already existed and isn't already
   // in front
   gtk_window_present_with_time(GTK_WINDOW(dialog_),
                                gtk_get_current_event_time());
 
   if (page == CONTENT_SETTINGS_TYPE_DEFAULT) {
     // Remember the last visited page from local state.
     page = static_cast<ContentSettingsType>(last_selected_page_.GetValue());
     if (page == CONTENT_SETTINGS_TYPE_DEFAULT)
       page = CONTENT_SETTINGS_TYPE_COOKIES;
@@ skipping 12 matching lines @@
   int index = page_num;
   DCHECK(index > CONTENT_SETTINGS_TYPE_DEFAULT &&
          index < CONTENT_SETTINGS_NUM_TYPES);
   last_selected_page_.SetValue(index);
 }
 
 void ContentSettingsWindowGtk::OnWindowDestroy(GtkWidget* widget) {
   settings_window = NULL;
   MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 }