-apple-trailing-word is needed for browser detection
Created attachment 366668 [details] Patch
Created attachment 366669 [details] Patch for committing
This a partial review and addressing post-review feedback, so it shouldn't need to be reviewed.
*** partial revert
Comment on attachment 366669 [details] Patch for committing Clearing flags on attachment: 366669 Committed r243841: <https://trac.webkit.org/changeset/243841>
All reviewed patches have been landed. Closing bug.
<rdar://problem/49582834>