Re-import newlines.vtt with the correct (mixed) line endings

Done using svn propset svn:mime-type application/octet-stream
and re-importing from
https://github.com/w3c/web-platform-tests/blob/c846444243f5a24224d63750253b7a4aed6f9408/old-tests/submission/Opera/media/track/webvtt/parsing/support/newlines.vtt

BUG=318734


git-svn-id: svn://svn.chromium.org/blink/trunk@161941 bbb929c8-8fbe-4397-9dbb-9b2b20218538