fix a memory leak and add a suppression

chrome/browser/ui/gtk/bookmarks/bookmark_utils_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 "chrome/browser/ui/gtk/bookmarks/bookmark_utils_gtk.h"
 
 #include "base/pickle.h"
 #include "base/string16.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 154 matching lines @@
 const char kBookmarkNode[] = "bookmark-node";
 
 GdkPixbuf* GetPixbufForNode(const BookmarkNode* node, BookmarkModel* model,
                             bool native) {
   GdkPixbuf* pixbuf;
 
   if (node->is_url()) {
     if (model->GetFavicon(node).width() != 0) {
       pixbuf = gfx::GdkPixbufFromSkBitmap(model->GetFavicon(node));
     } else {
-      pixbuf = GtkThemeService::GetDefaultFavicon(native)->ToGdkPixbuf();
+      pixbuf = GtkThemeService::GetDefaultFavicon(native).ToGdkPixbuf();
       g_object_ref(pixbuf);
     }
   } else {
-    pixbuf = GtkThemeService::GetFolderIcon(native)->ToGdkPixbuf();
+    pixbuf = GtkThemeService::GetFolderIcon(native).ToGdkPixbuf();
     g_object_ref(pixbuf);
   }
 
   return pixbuf;
 }
 
 GtkWidget* GetDragRepresentation(GdkPixbuf* pixbuf,
                                  const string16& title,
                                  GtkThemeService* provider) {
   GtkWidget* window = gtk_window_new(GTK_WINDOW_POPUP);
@@ skipping 260 matching lines @@
   GURL url;
   string16 title;
   if (!ui::ExtractNetscapeURL(selection_data, &url, &title))
     return false;
 
   model->AddURL(parent, idx, title, url);
   return true;
 }
 
 }  // namespace bookmark_utils