(See http://www.chromium.org/blink#launch-process for an overview)

Change description:
Blink sets break-word and -webkit-line-break by default on contenteditable containers.
However, Edge and FF don't do this.

Changes to API surface:
None.

Links:
Public standards discussion: 
https://bugs.chromium.org/p/chromium/issues/detail?id=427135
W3C editing TF (Apple, Google. Mozilla) agree to get rid of this.

Support in other browsers:
Internet Explorer:Not implemented
Firefox:Not implemented
Safari:Implemented

*Make sure to fill in any labels with a -?, including all OSes this change
affects. Feel free to leave other labels at the defaults.