Remove unused include in sequenced_worker_pool.h

components/upload_list/crash_upload_list.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 COMPONENTS_UPLOAD_LIST_CRASH_UPLOAD_LIST_H_
 #define COMPONENTS_UPLOAD_LIST_CRASH_UPLOAD_LIST_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/task_runner.h"
 #include "components/upload_list/upload_list.h"
 
 namespace base {
 class FilePath;
-class TaskRunner;
 }
 
 // An upload list manager for crash reports from breakpad.
 class CrashUploadList : public UploadList {
  public:
   // Should match kReporterLogFilename in
   // breakpad/src/client/apple/Framework/BreakpadDefines.h.
   static const char kReporterLogFilename[];
 
   // Creates a new crash upload list with the given callback delegate.
   CrashUploadList(Delegate* delegate,
                   const base::FilePath& upload_log_path,
                   scoped_refptr<base::TaskRunner> task_runner);
 
  protected:
   ~CrashUploadList() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CrashUploadList);
 };
 
 #endif  // COMPONENTS_UPLOAD_LIST_CRASH_UPLOAD_LIST_H_