The input field bounds used by selection handling does not take into account the X in the search field.
Created attachment 191006 [details] Patch
Comment on attachment 191006 [details] Patch LGTM.
Comment on attachment 191006 [details] Patch Clearing flags on attachment: 191006 Committed r144488: <http://trac.webkit.org/changeset/144488>
All reviewed patches have been landed. Closing bug.