Hello rsc, I'd like you to review this change to https://code.google.com/p/drawterm
*** Submitted as http://code.google.com/p/drawterm/source/detail?r=6797297a403f *** gui-x11: better snarfing with Chrome/Opera (ported from p9p, thanks Ethan Grammatikidis) R=rsc http://codereview.appspot.com/6402045