Changing the Weakptr initialization order in chrome/browser/extension folder

chrome/browser/extensions/user_script_loader.h

 // Copyright 2014 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_EXTENSIONS_USER_SCRIPT_LOADER_H_
 #define CHROME_BROWSER_EXTENSIONS_USER_SCRIPT_LOADER_H_
 
 #include <map>
 #include <set>
 
@@ skipping 150 matching lines @@
   // Whether or not we are currently loading.
   bool is_loading_;
 
   // The profile for which the scripts managed here are installed.
   Profile* profile_;
 
   // ID of the extension that owns these scripts, if any. This is only set to a
   // non-empty value for declarative user script shared memory regions.
   ExtensionId owner_extension_id_;
 
-  base::WeakPtrFactory<UserScriptLoader> weak_factory_;
-
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
+  base::WeakPtrFactory<UserScriptLoader> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(UserScriptLoader);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_USER_SCRIPT_LOADER_H_