reTarget: function () {
      // read parentNode on attached because if dynamically created,
      // parentNode will be null on creation.
      this.dialogElement = this.dialogElement || Polymer.dom(this).parentNode;
      // Check if parent implements paper-dialog-behavior. If not, fit scrollTarget to host.
      if (this.dialogElement && this.dialogElement.behaviors &&
          this.dialogElement.behaviors.indexOf(Polymer.PaperDialogBehaviorImpl) >= 0) {
        this.dialogElement.sizingTarget = this.sc