[Extensions] Remove linked_ptr entirely from extensions generated code

chrome/browser/chromeos/extensions/file_manager/job_event_router.h

 // Copyright 2015 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_CHROMEOS_EXTENSIONS_FILE_MANAGER_JOB_EVENT_ROUTER_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_JOB_EVENT_ROUTER_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/macros.h"
+#include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "chrome/common/extensions/api/file_manager_private.h"
 #include "components/drive/job_list.h"
 #include "extensions/browser/extension_event_histogram_value.h"
 #include "url/gurl.h"
 
@@ skipping 79 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<JobEventRouter> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(JobEventRouter);
 };
 
 }  // namespace file_manager
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_JOB_EVENT_ROUTER_H_