Move most of the component updater artifacts to update_client.

components/component_updater/url_fetcher_downloader.h

-// Copyright 2014 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_COMPONENT_UPDATER_URL_FETCHER_DOWNLOADER_H_
-#define COMPONENTS_COMPONENT_UPDATER_URL_FETCHER_DOWNLOADER_H_
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/threading/thread_checker.h"
-#include "base/time/time.h"
-#include "components/component_updater/crx_downloader.h"
-#include "net/url_request/url_fetcher_delegate.h"
-
-namespace net {
-class URLFetcher;
-class URLRequestContextGetter;
-}
-
-namespace component_updater {
-
-// Implements a CRX downloader in top of the URLFetcher.
-class UrlFetcherDownloader : public CrxDownloader,
-                             public net::URLFetcherDelegate {
- protected:
-  friend class CrxDownloader;
-  UrlFetcherDownloader(scoped_ptr<CrxDownloader> successor,
-                       net::URLRequestContextGetter* context_getter,
-                       scoped_refptr<base::SequencedTaskRunner> task_runner);
-  ~UrlFetcherDownloader() override;
-
- private:
-  // Overrides for CrxDownloader.
-  void DoStartDownload(const GURL& url) override;
-
-  // Overrides for URLFetcherDelegate.
-  void OnURLFetchComplete(const net::URLFetcher* source) override;
-  void OnURLFetchDownloadProgress(const net::URLFetcher* source,
-                                  int64_t current,
-                                  int64_t total) override;
-  scoped_ptr<net::URLFetcher> url_fetcher_;
-  net::URLRequestContextGetter* context_getter_;
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-
-  base::Time download_start_time_;
-
-  int64_t downloaded_bytes_;
-  int64_t total_bytes_;
-
-  base::ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(UrlFetcherDownloader);
-};
-
-}  // namespace component_updater
-
-#endif  // COMPONENTS_COMPONENT_UPDATER_URL_FETCHER_DOWNLOADER_H_