fix a memory leak and add a suppression

chrome/browser/ui/gtk/bookmarks/bookmark_tree_model.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_tree_model.h"
 
 #include <gtk/gtk.h>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/ui/gtk/bookmarks/bookmark_utils_gtk.h"
 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
 #include "ui/gfx/image/image.h"
 
 namespace {
 
 const char* kCellRendererTextKey = "__CELL_RENDERER_TEXT__";
 
 void AddSingleNodeToTreeStore(GtkTreeStore* store, const BookmarkNode* node,
                               GtkTreeIter *iter, GtkTreeIter* parent) {
   gtk_tree_store_append(store, iter, parent);
   // It would be easy to show a different icon when the folder is open (as they
   // do on Windows, for example), using pixbuf-expander-closed and
   // pixbuf-expander-open. Unfortunately there is no GTK_STOCK_OPEN_DIRECTORY
   // (and indeed, Nautilus does not render an expanded directory any
   // differently).
   gtk_tree_store_set(store, iter,
       bookmark_utils::FOLDER_ICON,
-      GtkThemeService::GetFolderIcon(true)->ToGdkPixbuf(),
+      GtkThemeService::GetFolderIcon(true).ToGdkPixbuf(),
       bookmark_utils::FOLDER_NAME,
       UTF16ToUTF8(node->GetTitle()).c_str(),
       bookmark_utils::ITEM_ID, node->id(),
       // We don't want to use node->is_folder() because that would let the
       // user edit "Bookmarks Bar" and "Other Bookmarks".
       bookmark_utils::IS_EDITABLE, node->type() == BookmarkNode::FOLDER,
       -1);
 }
 
 // Helper function for CommitTreeStoreDifferencesBetween() which recursively
@@ skipping 197 matching lines @@
     ret_val = UTF8ToUTF16(utf8str);
     g_value_unset(&value);
   } else {
     NOTREACHED() << "Impossible type mismatch";
   }
 
   return ret_val;
 }
 
 }  // namespace bookmark_utils