code: function CrosswalkDir(path) {
  
      this._path = path;
      this._root = "./";
  
      var versionFilePath = Path.join(path, "VERSION");
      if (ShellJS.test("-f", versionFilePath)) {
          this._version = Version.createFromFile(versionFilePath);
      } else {
          this._version = Version.createFromPath(path);
      }
  
      if (!this._version) {
          throw new Error("Failed to determine crosswalk version");
      }
  }
docs: Creates a CrosswalkDir object.
  @param {String} path Path to crosswalk build xwalk_app_template
  @constructor