chrome: scintilla: force set scimoz.[hv]ScrollBar in constructor.
http://bugs.activestate.com/show_bug.cgi?id=99982

This prevents horizontal scrollbars from showing up in the minimap.
Fixes fallout from r81116

(integrated from komodo (trunk) change 81326 by marky)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13404 b87d16e7-d29f-4ee1-b5ec-817d645d335f