Revert of Some linked_ptr removal in chromeos file_browser_handler.

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 <memory>
 #include <set>
 #include <string>
 
 #include "base/macros.h"
+#include "base/memory/linked_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"
 
 namespace file_manager {
@@ skipping 48 matching lines @@
       const drive::JobInfo& job_info,
       const extensions::api::file_manager_private::TransferState& state,
       const int64_t num_total_jobs,
       const int64_t num_completed_bytes,
       const int64_t num_total_bytes);
 
   // Delay time before sending progress events.
   base::TimeDelta event_delay_;
 
   // Set of job that are in the job schedular.
-  std::map<drive::JobID, std::unique_ptr<drive::JobInfo>> drive_jobs_;
+  std::map<drive::JobID, linked_ptr<drive::JobInfo>> drive_jobs_;
 
   // Job info of pending event. |ScheduleDriveFileTransferEvent| registers
   // timeout callback to dispatch this.
   std::unique_ptr<drive::JobInfo> pending_job_info_;
 
   // Transfer state of pending event.
   extensions::api::file_manager_private::TransferState pending_state_;
 
   // Computed bytes of tasks that have been processed. Once it completes all
   // tasks, it clears the variable.
   int64_t num_completed_bytes_;
 
   // Total bytes of tasks that have been processed. Once it completes all tasks,
   // it clears the variable.
   int64_t num_total_bytes_;
 
   // Thread checker.
   base::ThreadChecker thread_checker_;
 
   // 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_