nsICollation for macOS version uses ICU, so we should use it on all platform since nightly and aurora can use ICU on all platform.
MozReview-Commit-ID: 4nTzDCjOQXJ
--HG--
rename : intl/locale/tests/unit/test_collation_mac_icu.js => intl/locale/tests/unit/test_collation.js
extra : rebase_source : 3b47f9a521e79be929bb4c39d0c68b9438075e4c
nsCollation.cpp implements nsCollationFactory and nsCollation utils classes.
To remove nsIPlatfromCharset dependency, I would like to remove nsCollaction utils class. So at first, I would like to rename it to nsCollactionFactory.cpp. (then, nsICollation implementation will be nsCollation.cpp)
MozReview-Commit-ID: FaG3vfzi9cl
--HG--
rename : intl/locale/nsCollation.cpp => intl/locale/nsCollationFactory.cpp
rename : intl/locale/nsCollation.h => intl/locale/nsCollationFactory.h
extra : rebase_source : 25eebf52634310891d1bbcc974635b5cc4b1c402