Not that this is deliberately de-optimizing performance: Now, the HandleError
functions need to use the nsDependentCString constructor to determine the
length of the literals at run-time, since that's lost. While passing that
in addition would reduce the binary size wins again, and is not necessary,
since this code is only called in error situations, which are not
performance-critical.
Differential Revision: https://phabricator.services.mozilla.com/D89148