RegisterUploadCallback  522 chrome/browser/sync_file_system/drive_backend_v1/api_util.cc   UploadKey upload_key = RegisterUploadCallback(callback);
RegisterUploadCallback  892 chrome/browser/sync_file_system/drive_backend_v1/api_util.cc   UploadKey upload_key = RegisterUploadCallback(callback);
RegisterUploadCallback  236 chrome/browser/sync_file_system/drive_backend_v1/api_util.h   UploadKey RegisterUploadCallback(const UploadFileCallback& callback);