This flag was ignored before this patch and is always assumed to be true.
The fix for issue 591793 worked around of this as the fix was assumed to be short-lived, but hyphens support needs this too, and there seems to be a few more other users.
This might affect line-breaker refactoring. I have a WIP
https://codereview.chromium.org/1966703002
but ellipsis and a few others are relying on this and I need to get them sorted out. From the test results, maybe ellipsis already relies on this being wrong (which will not work with simple path) but I need to look into a bit further.
Comment 1 by kojii@chromium.org
, May 10 2016