Move most of the component updater artifacts to update_client.

components/update_client/crx_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_CRX_DOWNLOADER_H_
-#define COMPONENTS_COMPONENT_UPDATER_CRX_DOWNLOADER_H_
+#ifndef COMPONENTS_UPDATE_CLIENT_CRX_DOWNLOADER_H_
+#define COMPONENTS_UPDATE_CLIENT_CRX_DOWNLOADER_H_
 
 #include <stdint.h>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "url/gurl.h"
 
 namespace base {
 class SequencedTaskRunner;
 class SingleThreadTaskRunner;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
-namespace component_updater {
+namespace update_client {
 
 // Defines a download interface for downloading components, with retrying on
 // fallback urls in case of errors. This class implements a chain of
 // responsibility design pattern. It can give successors in the chain a chance
 // to handle a download request, until one of them succeeds, or there are no
 // more urls or successors to try. A callback is always called at the end of
 // the download, one time only.
 // When multiple urls and downloaders exists, first all the urls are tried, in
 // the order they are provided in the StartDownload function argument. After
 // that, the download request is routed to the next downloader in the chain.
@@ skipping 105 matching lines @@
   DownloadCallback download_callback_;
   ProgressCallback progress_callback_;
 
   std::vector<GURL>::iterator current_url_;
 
   std::vector<DownloadMetrics> download_metrics_;
 
   DISALLOW_COPY_AND_ASSIGN(CrxDownloader);
 };
 
-}  // namespace component_updater
+}  // namespace update_client
 
-#endif  // COMPONENTS_COMPONENT_UPDATER_CRX_DOWNLOADER_H_
+#endif  // COMPONENTS_UPDATE_CLIENT_CRX_DOWNLOADER_H_