Add chromeos=1 to build_chrome.sh
Add chromeos=1 to build_chrome.sh

Review URL: http://codereview.chromium.org/545031

mjg59/scripts,crawford/scripts,endocode/scripts,trnubo/scripts,coreos/scripts,sigma/coreos-scripts,vmware/coreos-scripts,glevand/coreos--scripts,vmware/coreos-scripts,zhang0137/scripts,crawford/scripts,marineam/coreos-scripts,nicescale/scripts,mjg59/scripts,zhang0137/scripts,andrejro/coreos--scripts,sigma/coreos-scripts,smilart/scripts,smilart/scripts,smilart/scripts,mischief/scripts,gtank/scripts,trnubo/scripts,andrejro/coreos--scripts,endocode/scripts,bcwaldon/coreos-scripts,BugRoger/scripts,fivethreeo/scripts,glevand/coreos--scripts,BugRoger/scripts,mischief/scripts,bcwaldon/coreos-scripts,bcwaldon/coreos-scripts,BugRoger/scripts,trnubo/scripts,crawford/scripts,marineam/coreos-scripts,andrejro/coreos--scripts,gtank/scripts,nicescale/scripts,nicescale/scripts,fivethreeo/scripts,endocode/scripts,sigma/coreos-scripts,mischief/scripts,vmware/coreos-scripts,coreos/scripts,mjg59/scripts,marineam/coreos-scripts,zhang0137/scripts,fivethreeo/scripts,gtank/scripts