I'm having the same problem. I've checked the com.apple.dock plist and
it's listed there. I have also tried running 'killall Dock' but Chrome
still doesn't show up in the Add Dock Items list in Casper Admin. I've
noticed that Safari, Screen Sharing, ...
At this point it seems like an issue specific to Mavericks. I tried it
on both a clean Mavericks VM as well as a 10.9 physical machine. It's
just the OS with Composer installed on it and there aren't any spaces in
the package name. Everything failed ...