Bug 1668999 [wpt PR 25961] - Test "scale" where x == y but z != 1, to make sure that y is not dropped., a=testonly

Automatic update from web-platform-tests
Test "scale" where x == y but z != 1, to make sure that y is not dropped.

--

wpt-commits: f2791b72df36027cf169e009f21a7b2bfdfd3f45
wpt-pr: 25961

testing/web-platform/tests/css/css-transforms/parsing/scale-parsing-valid.html

@@ -35,6 +35,7 @@ test_valid_value("scale", "100% 200%", "1 2");
 test_valid_value("scale", "100 200 1", "100 200");
 test_valid_value("scale", "100% 200% 1", "1 2");
 test_valid_value("scale", "100 200 300");
+test_valid_value("scale", "100 100 2", "100 100 2");
 
 </script>
 </body>