Add a ScopedPangoFontDescription helper class and use it.

chrome/browser/ui/gtk/certificate_viewer_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 <gtk/gtk.h>
 #include <pango/pango-font.h>
 
 #include <algorithm>
 #include <vector>
 
 #include "base/i18n/time_formatting.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/certificate_viewer.h"
 #include "chrome/browser/ui/certificate_dialogs.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
 #include "chrome/common/net/x509_certificate_model.h"
 #include "grit/generated_resources.h"
 #include "net/base/x509_certificate.h"
 #include "ui/base/gtk/gtk_hig_constants.h"
 #include "ui/base/gtk/menu_label_accelerator_util.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/pango_util.h"
 
 namespace {
 
 const char kDetailsFontFamily[] = "monospace";
 
 ////////////////////////////////////////////////////////////////////////////////
 // Gtk utility functions.
 
 void AddTitle(GtkTable* table, int row, const std::string& text) {
   gtk_table_attach_defaults(table,
@@ skipping 592 matching lines @@
   gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(value_scroll_window),
                                  GTK_POLICY_AUTOMATIC,
                                  GTK_POLICY_AUTOMATIC);
   gtk_scrolled_window_set_shadow_type(
       GTK_SCROLLED_WINDOW(value_scroll_window), GTK_SHADOW_ETCHED_IN);
   gtk_container_add(GTK_CONTAINER(value_scroll_window), field_value_view);
   gtk_box_pack_start(GTK_BOX(value_vbox),
                      value_scroll_window, TRUE, TRUE, 0);
 
   gtk_widget_ensure_style(field_value_view);
-  PangoFontDescription* font_desc = pango_font_description_copy(
-      gtk_widget_get_style(field_value_view)->font_desc);
-  pango_font_description_set_family(font_desc, kDetailsFontFamily);
-  gtk_widget_modify_font(field_value_view, font_desc);
-  pango_font_description_free(font_desc);
+  gfx::ScopedPangoFontDescription font_desc(pango_font_description_copy(
+      gtk_widget_get_style(field_value_view)->font_desc));
+  pango_font_description_set_family(font_desc.get(), kDetailsFontFamily);
+  gtk_widget_modify_font(field_value_view, font_desc.get());
 
   GtkWidget* export_hbox = gtk_hbox_new(FALSE, 0);
   gtk_box_pack_start(GTK_BOX(details_page_vbox_), export_hbox,
                      FALSE, FALSE, 0);
   export_button_ = gtk_button_new_with_mnemonic(
       ui::ConvertAcceleratorsFromWindowsStyle(
           l10n_util::GetStringUTF8(
               IDS_CERT_DETAILS_EXPORT_CERTIFICATE)).c_str());
   g_signal_connect(export_button_, "clicked",
                    G_CALLBACK(OnExportClicked), this);
@@ skipping 64 matching lines @@
 void CertificateViewer::Show() {
   gtk_util::ShowDialog(dialog_);
 }
 
 } // namespace
 
 void ShowCertificateViewer(gfx::NativeWindow parent,
                            net::X509Certificate* cert) {
   (new CertificateViewer(parent, cert))->Show();
 }