Fix scheduled_test after corelib broke it.

Fix scheduled_test after corelib broke it.

Committed: https://code.google.com/p/dart/source/detail?r=19416

[Bob Nystrom, 2013-03-04 19:26:28]

Hey Florian, your patch (https://code.google.com/p/dart/source/detail?r=19406)
broke a package under pkg, which in turn broke the VM and pub bots. When you
make corelib changes, can you run:

$ ./tools/test.py -m release pkg pub

Before checking in? Thanks.

[ricow1, 2013-03-04 19:27:23]

LGTM

[Bob Nystrom, 2013-03-04 19:28:13]

Committed patchset #1 manually as r19416 (presubmit successful).

[floitsch, 2013-03-04 20:16:12]

LGTM.
sorry this one slipped through.