Create a about handler component.

net/url_request/url_request_about_job.h

-// Copyright (c) 2011 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 NET_URL_REQUEST_URL_REQUEST_ABOUT_JOB_H_
-#define NET_URL_REQUEST_URL_REQUEST_ABOUT_JOB_H_
-
-#include <string>
-
-#include "base/memory/weak_ptr.h"
-#include "net/url_request/url_request.h"
-#include "net/url_request/url_request_job.h"
-
-namespace net {
-
-class NET_EXPORT URLRequestAboutJob : public URLRequestJob {
- public:
-  URLRequestAboutJob(URLRequest* request, NetworkDelegate* network_delegate);
-
-  // URLRequestJob:
-  void Start() override;
-  bool GetMimeType(std::string* mime_type) const override;
-
- private:
-  ~URLRequestAboutJob() override;
-
-  void StartAsync();
-
-  base::WeakPtrFactory<URLRequestAboutJob> weak_factory_;
-};
-
-}  // namespace net
-
-#endif  // NET_URL_REQUEST_URL_REQUEST_ABOUT_JOB_H_