This occurence of eval() in a file used only for testing (and only for a single test, as it seems) triggers our eval()-Assertion:
Under the given circumstances, it seems easiest to flip the eval-exception pref for this case.
Flip pref to allow the use of eval() in this purely test-related case.
Pushed by email@example.com:
Remove chrometask_chromescript from eval()-whitelist, r=ckerschb