Mechanical change of base::Time to base::TimeTicks in the component updater.

components/update_client/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_UPDATE_CLIENT_URL_FETCHER_DOWNLOADER_H_
 #define COMPONENTS_UPDATE_CLIENT_URL_FETCHER_DOWNLOADER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 32 matching lines @@
   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;
   std::unique_ptr<net::URLFetcher> url_fetcher_;
   net::URLRequestContextGetter* context_getter_;
 
-  base::Time download_start_time_;
+  base::TimeTicks download_start_time_;
 
   int64_t downloaded_bytes_;
   int64_t total_bytes_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(UrlFetcherDownloader);
 };
 
 }  // namespace update_client
 
 #endif  // COMPONENTS_UPDATE_CLIENT_URL_FETCHER_DOWNLOADER_H_