This harness has support for test on vm machines. It takes a base image and target image path, creates an update-enabled vm image from the base image and performs updates using cros_run_vm_update (vm wrapper around image_to_live). It uses --snapshot for updating vm's and keeps them on (like a real machine would) so that the VM image is clean on the next test.
The current check in has two test cases -- updates without clobbering the stateful partition and updates with clobbering the stateful partition.
Change-Id: I5406eadb39fa36601d17f8dd15625bd6a8b38c15
BUG=6911
TEST=Ran through tests.
Review URL: http://codereview.chromium.org/3554002
