Cannot find webarh/malware redirect infection that only shows on Chrome

Switch to twentyten or another theme for a second and make a test post. That will eliminate the theme.

And replace all WP core files folders with ones of the same version; it could still be hiding there. Just upload them; don’t do an install. This is a typical hack fix.

Or, if you did completely clean the site, it could be a a fluke of the theme’s js – or a plugin – that is throwing a signature that Chrome interprets as malware.