Add ProgressCallback to DriveServiceInterface::DownloadFile.

chrome/browser/google_apis/drive_api_service.cc

Index: chrome/browser/google_apis/drive_api_service.cc
diff --git a/chrome/browser/google_apis/drive_api_service.cc b/chrome/browser/google_apis/drive_api_service.cc
index 5f02e3c21a4b383a839a088f9620dcd618db4fc4..621c87c4b5f701acf1d11e0ee51bff57d7217dea 100644
--- a/chrome/browser/google_apis/drive_api_service.cc
+++ b/chrome/browser/google_apis/drive_api_service.cc
@@ -433,7 +433,8 @@ void DriveAPIService::DownloadFile(
     const base::FilePath& local_cache_path,
     const GURL& download_url,
     const DownloadActionCallback& download_action_callback,
-    const GetContentCallback& get_content_callback) {
+    const GetContentCallback& get_content_callback,
+    const ProgressCallback& progress_callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!download_action_callback.is_null());
   // get_content_callback may be null.
@@ -443,6 +444,7 @@ void DriveAPIService::DownloadFile(
                                 url_request_context_getter_,
                                 download_action_callback,
                                 get_content_callback,
+                                progress_callback,
                                 download_url,
                                 virtual_path,
                                 local_cache_path));