user/test/com/google/gwt/resources/converter/font-family.gss

@def DEFAULT_FONT_FAMILY Arial, Helvetica, sans-serif;

div {
  font-family: DEFAULT_FONT_FAMILY;
}

span {
  font-family: Helvetica,'Comic sans MS',DEFAULT_FONT_FAMILY;
}

.someClass {
  font-family: 'Arial Unicode MS',Arial,sans-serif !important;
}