Cleanup in preparation for upcoming patches:
- By using an accessor method, nsTPromiseFlatString no longer needs to be a friend.
- The explicit uint32_t constructors are unused.
- The abstract_string_type typedef is unused (and will be potentially confusing in the next patch, so removing).
- The three-param ctor for nsTSubstring no longer needs to be public "for convenience".
- friend class nsTObsoleteAStringThunk_CharT no longer exists.
MozReview-Commit-ID: 4ibJLNzn13k
Cleanup in preparation for upcoming patches:
- By using an accessor method, nsTPromiseFlatString no longer needs to be a friend.
- The explicit uint32_t constructors are unused.
- The abstract_string_type typedef is unused (and will be potentially confusing in the next patch, so removing).
- The three-param ctor for nsTSubstring no longer needs to be public "for convenience".
- friend class nsTObsoleteAStringThunk_CharT no longer exists.
MozReview-Commit-ID: 4ibJLNzn13k