size(width, height) {
    var viewport = {
      scale: 1.0,
      scalable: "no"
    };
    this.layoutStyle("scrolling");

    if (width >= 0) {
      this.width(width);
      viewport.width = width;
      this.css("padding", "0 " + width / 12 + "px");
    }

    if (height >= 0) {
      this.height(height);
      viewport.height = height;
    }

    this.css("margin", "0");
    this.css("box-sizing", "border-box");
    this.viewport(viewport);
  }
Size the contents to a given width and height
@param {number} [width]
@param {number} [height]