mouseup', this.onMouseUp_);
    e.preventDefault();
    return true;
  },

  onMouseUp_(e) {
    document.removeEventListener('mousemove', this.onMouseMove_);
    document.removeEventListener('mouseup', this.onMouseUp_);
    e.preventDefault();
    this.currentDraggingSize_ = undefined;
  }
});
</script>
