y started.
      // Set scrollTop to itself so that Closure Compiler doesn't remove this.
      this.scrollTop = this.scrollTop;
    },

    /**
     * Applies focus according to the opened state.
     * @protected
     */
    _applyFocus: function() {
      if (this.opened) {
        if (!this.noAutoFocus) {
          this._focusNode.focus();
        }
      }
      else {
        this._focusNode.blur();
        this._focusedChild = null;
        // Restore focus.
        if (this.restoreFocusOnClose && th