gdata: Convert GDataFileSystem::AddUploadFile() to asynchronous.

chrome/browser/chromeos/gdata/gdata_download_observer.cc

Index: chrome/browser/chromeos/gdata/gdata_download_observer.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_download_observer.cc b/chrome/browser/chromeos/gdata/gdata_download_observer.cc
index 11f11e145815a664cfe3657ca5936bf8f572efa8..4d4443690aaff2f7f21a26c3ede16468790f9023 100644
--- a/chrome/browser/chromeos/gdata/gdata_download_observer.cc
+++ b/chrome/browser/chromeos/gdata/gdata_download_observer.cc
@@ -376,9 +376,10 @@ scoped_ptr<UploadFileInfo> GDataDownloadObserver::CreateUploadFileInfo(
   return upload_file_info.Pass();
 }
 
-void GDataDownloadObserver::OnUploadComplete(int32 download_id,
-                                             base::PlatformFileError error,
-                                             UploadFileInfo* upload_file_info) {
+void GDataDownloadObserver::OnUploadComplete(
+    int32 download_id,
+    base::PlatformFileError error,
+    scoped_ptr<UploadFileInfo> upload_file_info) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DownloadMap::iterator iter = pending_downloads_.find(download_id);
   if (iter == pending_downloads_.end()) {