Move most of the component updater artifacts to update_client.

components/update_client/url_fetcher_downloader.cc

Index: components/update_client/url_fetcher_downloader.cc
diff --git a/components/update_client/url_fetcher_downloader.cc b/components/update_client/url_fetcher_downloader.cc
new file mode 100644
index 0000000000000000000000000000000000000000..fd7f3da0b0bb54c227841b9e7de84d4e91879676
--- /dev/null
+++ b/components/update_client/url_fetcher_downloader.cc
@@ -0,0 +1,109 @@
+// 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.
+
+#include "components/update_client/url_fetcher_downloader.h"
+
+#include <stdint.h>
+
+#include "base/logging.h"
+#include "base/sequenced_task_runner.h"
+#include "components/update_client/utils.h"
+#include "net/base/load_flags.h"
+#include "net/url_request/url_fetcher.h"
+#include "url/gurl.h"
+
+namespace update_client {
+
+UrlFetcherDownloader::UrlFetcherDownloader(
+    scoped_ptr<CrxDownloader> successor,
+    net::URLRequestContextGetter* context_getter,
+    scoped_refptr<base::SequencedTaskRunner> task_runner)
+    : CrxDownloader(successor.Pass()),
+      context_getter_(context_getter),
+      task_runner_(task_runner),
+      downloaded_bytes_(-1),
+      total_bytes_(-1) {
+}
+
+UrlFetcherDownloader::~UrlFetcherDownloader() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
+
+void UrlFetcherDownloader::DoStartDownload(const GURL& url) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  url_fetcher_.reset(
+      net::URLFetcher::Create(0, url, net::URLFetcher::GET, this));
+  url_fetcher_->SetRequestContext(context_getter_);
+  url_fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
+                             net::LOAD_DO_NOT_SAVE_COOKIES |
+                             net::LOAD_DISABLE_CACHE);
+  url_fetcher_->SetAutomaticallyRetryOn5xx(false);
+  url_fetcher_->SaveResponseToTemporaryFile(task_runner_);
+
+  VLOG(1) << "Starting background download: " << url.spec();
+  url_fetcher_->Start();
+
+  download_start_time_ = base::Time::Now();
+
+  downloaded_bytes_ = -1;
+  total_bytes_ = -1;
+}
+
+void UrlFetcherDownloader::OnURLFetchComplete(const net::URLFetcher* source) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  const base::Time download_end_time(base::Time::Now());
+  const base::TimeDelta download_time =
+      download_end_time >= download_start_time_
+          ? download_end_time - download_start_time_
+          : base::TimeDelta();
+
+  // Consider a 5xx response from the server as an indication to terminate
+  // the request and avoid overloading the server in this case.
+  // is not accepting requests for the moment.
+  const int fetch_error(GetFetchError(*url_fetcher_));
+  const bool is_handled = fetch_error == 0 || IsHttpServerError(fetch_error);
+
+  Result result;
+  result.error = fetch_error;
+  if (!fetch_error) {
+    source->GetResponseAsFilePath(true, &result.response);
+  }
+  result.downloaded_bytes = downloaded_bytes_;
+  result.total_bytes = total_bytes_;
+
+  DownloadMetrics download_metrics;
+  download_metrics.url = url();
+  download_metrics.downloader = DownloadMetrics::kUrlFetcher;
+  download_metrics.error = fetch_error;
+  download_metrics.downloaded_bytes = downloaded_bytes_;
+  download_metrics.total_bytes = total_bytes_;
+  download_metrics.download_time_ms = download_time.InMilliseconds();
+
+  base::FilePath local_path_;
+  source->GetResponseAsFilePath(false, &local_path_);
+  VLOG(1) << "Downloaded " << downloaded_bytes_ << " bytes in "
+          << download_time.InMilliseconds() << "ms from "
+          << source->GetURL().spec() << " to " << local_path_.value();
+  CrxDownloader::OnDownloadComplete(is_handled, result, download_metrics);
+}
+
+void UrlFetcherDownloader::OnURLFetchDownloadProgress(
+    const net::URLFetcher* source,
+    int64_t current,
+    int64_t total) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  downloaded_bytes_ = current;
+  total_bytes_ = total;
+
+  Result result;
+  result.downloaded_bytes = downloaded_bytes_;
+  result.total_bytes = total_bytes_;
+
+  OnDownloadProgress(result);
+}
+
+}  // namespace update_client