Remove some unused linked_ptr.h includes in c/b/extensions/api

chrome/browser/extensions/api/feedback_private/feedback_service.h

 // Copyright 2013 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_API_FEEDBACK_PRIVATE_FEEDBACK_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_FEEDBACK_PRIVATE_FEEDBACK_SERVICE_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/blob_reader.h"
 #include "chrome/browser/feedback/system_logs/scrubbed_system_logs_fetcher.h"
 #include "chrome/common/extensions/api/feedback_private.h"
 #include "components/feedback/feedback_data.h"
 
 class Profile;
 
 namespace extensions {
 
@@ skipping 45 matching lines @@
   // data object once all the requisite data has been populated.
   void CompleteSendFeedback(scoped_refptr<feedback::FeedbackData> feedback_data,
                             const SendFeedbackCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FeedbackService);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_FEEDBACK_PRIVATE_FEEDBACK_SERVICE_H_