fix a memory leak and add a suppression

chrome/browser/ui/gtk/gtk_theme_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_GTK_GTK_THEME_SERVICE_H_
 #define CHROME_BROWSER_UI_GTK_GTK_THEME_SERVICE_H_
 #pragma once
 
 #include <map>
 #include <vector>
 
 #include "base/compiler_specific.h"
+#include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "ui/base/glib/glib_integers.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/gtk/owned_widget_gtk.h"
 #include "ui/gfx/color_utils.h"
 
 class Profile;
@@ skipping 113 matching lines @@
   SkColor get_inactive_selection_bg_color() const {
     return inactive_selection_bg_color_;
   }
   SkColor get_inactive_selection_fg_color() const {
     return inactive_selection_fg_color_;
   }
 
   // These functions return an image that is not owned by the caller and should
   // not be deleted. If |native| is true, get the GTK_STOCK version of the
   // icon.
-  static gfx::Image* GetFolderIcon(bool native);
-  static gfx::Image* GetDefaultFavicon(bool native);
+  static gfx::Image GetFolderIcon(bool native);
+  static gfx::Image GetDefaultFavicon(bool native);
 
   // Whether we use the GTK theme by default in the current desktop
   // environment. Returns true when we GTK defaults to on.
   static bool DefaultUsesSystemTheme();
 
  private:
   typedef std::map<int, SkColor> ColorMap;
   typedef std::map<int, color_utils::HSL> TintMap;
   typedef std::map<int, gfx::Image*> ImageCache;
 
@@ skipping 135 matching lines @@
   PrefChangeRegistrar registrar_;
 
   // This is a dummy widget that only exists so we have something to pass to
   // gtk_widget_render_icon().
   static GtkWidget* icon_widget_;
 
   // The default folder icon and default bookmark icon for the GTK theme.
   // These are static because the system can only have one theme at a time.
   // They are cached when they are requested the first time, and cleared when
   // the system theme changes.
-  static gfx::Image* default_folder_icon_;
-  static gfx::Image* default_bookmark_icon_;
+  static base::LazyInstance<gfx::Image> default_folder_icon_;
+  static base::LazyInstance<gfx::Image> default_bookmark_icon_;
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_GTK_THEME_SERVICE_H_