msiexec /q /i "googlechromefile.msi"
I found the below command to install silently. This was taken from a Google Groups discussion at the following link. LINK: http://groups.google.com/a/googleproductforums.com/forum/#!topic/chrome/8XnSOnhLBzA
msiexec /q /i <googlechromefile>.msi
Silent install - pass the /S or -ms as a flag.
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