function getContentAreaWidthPx(style)
        {
            var width = style.get("width").replace(/px$/, "");
            if (!isNaN(width) && style.get("box-sizing") === "border-box") {
                var borderBox = self._getBox(style, "border");
                var paddingBox = self._getBox(style, "padding");

                width = width - borderBox.left - borderBox.right - paddingBox.left - paddingBox.right;
            }

            return Number.toFixedIfFloating(width.toString());
        }
@param {!Map.<string, string>} style
@return {string}