static CssLength SetLineHeight(this CssBox box, CssLength len)
{
//2014,2015,
//from www.w3c.org/wiki/Css/Properties/line-height
//line height in <percentage> :
//The computed value if the property is percentage multiplied by the
//element's computed font size.
return(CssLength.MakePixelLength(
CssValueParser.ConvertToPx(len, box.GetEmHeight(), box)));
}
