[Extensions] Remove linked_ptr entirely from extensions generated code

extensions/browser/api/declarative/rules_registry.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_API_DECLARATIVE_RULES_REGISTRY_H__
 #define EXTENSIONS_BROWSER_API_DECLARATIVE_RULES_REGISTRY_H__
 
 #include <stddef.h>
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/common/api/events.h"
 #include "extensions/common/one_shot_event.h"
 
 namespace content {
 class BrowserContext;
@@ skipping 266 matching lines @@
   base::WeakPtr<RulesCacheDelegate> cache_delegate_;
 
   base::WeakPtrFactory<RulesRegistry> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RulesRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_DECLARATIVE_RULES_REGISTRY_H__