function _setupContentDirection() {
		var sDir = Localization.getRTL() ? "rtl" : "ltr";
		document.documentElement.setAttribute("dir", sDir); // webkit does not allow setting document.dir before the body exists
		Log.info("Content direction set to '" + sDir + "'", null, "sap.ui.core.boot");
	}
Set the document's dir property
@private