Temporarily modify the test to confirm theory about the source of intermittent failures.

layout/reftests/bugs/289480.html

@@ -98,7 +98,7 @@
    .parser { height: 3em; }
    .parser { width: 200; }
    .parser { border: 5em solid red ! error; }
-   .parser { background: red pink pink; }
+   .parser { background: aqua pink pink; }
 
    /* line fourteen (last line of face): table */
    ul { display: table; padding: 0; margin: -1em 7em 0; background: red; }