Retrieve the backupPath from the storage provider itself

src/storage/noop.js

@@ -1,6 +1,8 @@
 'use strict';
 
 exports = module.exports = {
+    getBackupPath: getBackupPath,
+
     upload: upload,
     download: download,
     downloadDir: downloadDir,
@@ -21,6 +23,11 @@ var assert = require('assert'),
     debug = require('debug')('box:storage/noop'),
     EventEmitter = require('events');
 
+function getBackupPath(apiConfig) {
+    assert.strictEqual(typeof apiConfig, 'object');
+    return '';
+}
+
 function upload(apiConfig, backupFilePath, sourceStream, callback) {
     assert.strictEqual(typeof apiConfig, 'object');
     assert.strictEqual(typeof backupFilePath, 'string');