Fix remaining WeakPtrFactory ordering problems

chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.h

 // Copyright 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_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_
 #define CHROME_BROWSER_UI_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_
 
 #include <set>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 152 matching lines @@
 
   // Index of the last local entry (recently closed tab or window) in the
   // menumodel.
   int last_local_model_index_;
 
   gfx::Image default_favicon_;
 
   base::CancelableTaskTracker local_tab_cancelable_task_tracker_;
   base::CancelableTaskTracker other_devices_tab_cancelable_task_tracker_;
 
-  base::WeakPtrFactory<RecentTabsSubMenuModel> weak_ptr_factory_;
-
   // Time the menu is open for until a recent tab is selected.
   base::ElapsedTimer menu_opened_timer_;
 
+  base::WeakPtrFactory<RecentTabsSubMenuModel> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(RecentTabsSubMenuModel);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_