| Test that CSS stylesheets don't lose custom properties on GC when only reachable through child rules. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS sheet.__proto__ is CSSStyleSheet.prototype | |
| PASS rule.parentStyleSheet.foo is "0" | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |