Follow-up patch 3 to bug 1041631 part 1. Make two more tests pass when Symbol is not defined. r=efaust.

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extra : rebase_source : deb04af3b51e9fc46899f4bbd222b4f948a9c496
extra : amend_source : 3efd2146ee512cef6cece65caba4f2f159f0b567