Use new API to download blobs from Google Drive.

components/drive/service/drive_api_service.cc

Index: components/drive/service/drive_api_service.cc
diff --git a/components/drive/service/drive_api_service.cc b/components/drive/service/drive_api_service.cc
index 2ee98b16f165804e8a04122ced715b76361db319..7abb9ceb4796f1e21e9699e46d8cfb1d0fb424e4 100644
--- a/components/drive/service/drive_api_service.cc
+++ b/components/drive/service/drive_api_service.cc
@@ -250,13 +250,12 @@ DriveAPIService::DriveAPIService(
     net::URLRequestContextGetter* url_request_context_getter,
     base::SequencedTaskRunner* blocking_task_runner,
     const GURL& base_url,
-    const GURL& base_download_url,
     const GURL& base_thumbnail_url,
     const std::string& custom_user_agent)
     : oauth2_token_service_(oauth2_token_service),
       url_request_context_getter_(url_request_context_getter),
       blocking_task_runner_(blocking_task_runner),
-      url_generator_(base_url, base_download_url, base_thumbnail_url),
+      url_generator_(base_url, base_thumbnail_url),
       custom_user_agent_(custom_user_agent) {
 }