[css-font-loading] Remove the 'font load' term, as it's no longer necessary.
[css-font-loading] Add [NoInterfaceObject] to FontFaceSource.
[css-snappoints] Removing snap-list in favor of a list of lengths.

--HG--
extra : rebase_source : 53b020447bc961097324364ef9bf0907b4e599a8