Set editing boundary crossing rule to make sure it won't cross editing boundary when selection expands.
Created attachment 195644 [details] Patch
Created attachment 195651 [details] patch
Comment on attachment 195651 [details] patch LGTM.
Comment on attachment 195651 [details] patch Clearing flags on attachment: 195651 Committed r147189: <http://trac.webkit.org/changeset/147189>
All reviewed patches have been landed. Closing bug.