[Device Discovery] Move files from browser/extensions/api/dial to browser/media/router/discovery/di…

chrome/browser/extensions/api/dial/device_description_fetcher.h

-// Copyright (c) 2017 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_DIAL_DEVICE_DESCRIPTION_FETCHER_H_
-#define CHROME_BROWSER_EXTENSIONS_API_DIAL_DEVICE_DESCRIPTION_FETCHER_H_
-
-#include <memory>
-#include <string>
-
-#include "base/callback.h"
-#include "base/threading/thread_checker.h"
-#include "content/public/browser/browser_thread.h"
-#include "net/url_request/url_fetcher_delegate.h"
-#include "url/gurl.h"
-
-namespace net {
-class URLFetcher;
-class URLRequestContextGetter;
-}
-
-namespace extensions {
-namespace api {
-namespace dial {
-
-struct DialDeviceDescriptionData;
-
-// Used to make a single HTTP GET request with |device_description_url| to fetch
-// a uPnP device description from a DIAL device.  If successful, |success_cb| is
-// invoked with the result; otherwise, |error_cb| is invoked with an error
-// reason.
-// This class is not thread safe.
-class DeviceDescriptionFetcher : public net::URLFetcherDelegate {
- public:
-  // Used to identify the net::URLFetcher instance for tests.
-  static constexpr int kURLFetcherIDForTest = 1;
-
-  // |request_context| is unowned; the caller must ensure that this object does
-  // not outlive it.
-  DeviceDescriptionFetcher(
-      const GURL& device_description_url,
-      net::URLRequestContextGetter* request_context,
-      base::OnceCallback<void(const DialDeviceDescriptionData&)> success_cb,
-      base::OnceCallback<void(const std::string&)> error_cb);
-
-  ~DeviceDescriptionFetcher() override;
-
-  void Start();
-
- private:
-  // net::URLFetcherDelegate implementation.
-  void OnURLFetchComplete(const net::URLFetcher* source) override;
-  void OnURLFetchDownloadProgress(const net::URLFetcher* source,
-                                  int64_t current,
-                                  int64_t total,
-                                  int64_t current_network_bytes) override;
-  void OnURLFetchUploadProgress(const net::URLFetcher* source,
-                                int64_t current,
-                                int64_t total) override;
-
-  // Runs |error_cb_| with |message| and clears it.
-  void ReportError(const std::string& message);
-
-  const GURL device_description_url_;
-  const scoped_refptr<net::URLRequestContextGetter> request_context_;
-  base::ThreadChecker thread_checker_;
-
-  base::OnceCallback<void(const DialDeviceDescriptionData&)> success_cb_;
-  base::OnceCallback<void(const std::string&)> error_cb_;
-  std::unique_ptr<net::URLFetcher> fetcher_;
-};
-
-}  // namespace dial
-}  // namespace api
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_DIAL_DEVICE_DESCRIPTION_FETCHER_H_