Merge Servo and Gecko selector parser implementations #132
Description
These are now the same in Servo and Gecko but the implementation is duplicated. See: https://phabricator.services.mozilla.com/D234469#inline-1303461
{{ message }}
These are now the same in Servo and Gecko but the implementation is duplicated. See: https://phabricator.services.mozilla.com/D234469#inline-1303461