Paint a focus indication on LinkButtonGtk buttons....

chrome/common/gtk_util.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/gtk_util.h"
 
 #include <gtk/gtk.h>
 
 #include "base/linux_util.h"
 #include "base/logging.h"
@@ skipping 104 matching lines @@
       "  GtkDialog::action-area-border = 12\n"
       "  GtkDialog::button-spacing = 6\n"
       "  GtkDialog::content-area-spacing = 18\n"
       "  GtkDialog::content-area-border = 0\n"
       "}\n"
       "widget \"about-dialog\" style : application \"about-dialog\"\n";
 
   gtk_rc_parse_string(kRCText);
 }
 
+void CenterWidgetInHBox(GtkWidget* hbox, GtkWidget* widget, bool pack_at_end,
+                        int padding) {
+  GtkWidget* centering_vbox = gtk_vbox_new(FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(centering_vbox), widget, TRUE, FALSE, 0);
+  if (pack_at_end)
+    gtk_box_pack_end(GTK_BOX(hbox), centering_vbox, FALSE, FALSE, padding);
+  else
+    gtk_box_pack_start(GTK_BOX(hbox), centering_vbox, FALSE, FALSE, padding);
+}
+
 }  // namespace gtk_util