Re-try with full updates if first delta fails.
Re-try with full updates if first delta fails.

Change-Id: Ica7360dc4b2a62384874ba1b802039289747c6e3

BUG=
TEST=Ran it

Review URL: http://codereview.chromium.org/4137010

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