Code refactor related to WeakPtrFactory in src/components module

components/web_cache/browser/web_cache_manager.h

 // Copyright (c) 2011 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.
 
 // This is the browser side of the cache manager, it tracks the activity of the
 // render processes and allocates available memory cache resources.
 
 #ifndef COMPONENTS_WEB_CACHE_BROWSER_WEB_CACHE_MANAGER_H_
 #define COMPONENTS_WEB_CACHE_BROWSER_WEB_CACHE_MANAGER_H_
 
@@ skipping 211 matching lines @@
 
   // Every renderer we think is still around is in one of these two sets.
   //
   // Active renderers are those renderers that have been active more recently
   // than they have been inactive.
   std::set<int> active_renderers_;
   // Inactive renderers are those renderers that have been inactive more
   // recently than they have been active.
   std::set<int> inactive_renderers_;
 
+  content::NotificationRegistrar registrar_;
+
   base::WeakPtrFactory<WebCacheManager> weak_factory_;
 
-  content::NotificationRegistrar registrar_;
-
   DISALLOW_COPY_AND_ASSIGN(WebCacheManager);
 };
 
 }  // namespace web_cache
 
 #endif  // COMPONENTS_WEB_CACHE_BROWSER_WEB_CACHE_MANAGER_H_