Follow-up patch 4 to bug 1041631 part 1 - Fix two more tests to pass in builds where Symbol is not defined. r=efaust, a=philor.

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extra : rebase_source : 62cc2eb36e3c579878f08adfdb88b46a5e6fd420
extra : amend_source : 46624c7c283cb8689867cda3ae86bdf7ad429d27