ACCESS DENIED workaround Added chrome_root_mount option to specify the mount point to work around a permissions issue.
ACCESS DENIED workaround
Added chrome_root_mount option to specify the mount point to work around a permissions issue.

BUG=3464
TEST=none

Review URL: http://codereview.chromium.org/2126011

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